diff --git a/app/models/repository/mercurial.rb b/app/models/repository/mercurial.rb
index 5eedbb7eb..42ac32913 100644
--- a/app/models/repository/mercurial.rb
+++ b/app/models/repository/mercurial.rb
@@ -152,16 +152,24 @@ class Repository::Mercurial < Repository
     (db_rev + 1).step(scm_rev, FETCH_AT_ONCE) do |i|
       scm.each_revision('', i, [i + FETCH_AT_ONCE - 1, scm_rev].min) do |re|
         transaction do
-          parents = (re.parents || []).collect{|rp| find_changeset_by_name(rp)}.compact
+          scmid = re.scmid[0, 12]
+          parents = (re.parents || []).collect do |rp|
+            find_changeset_by_name(rp[0, 12])
+          end.compact
           cs = Changeset.create(:repository   => self,
                                 :revision     => re.revision,
-                                :scmid        => re.scmid,
+                                :scmid        => scmid,
                                 :committer    => re.author,
                                 :committed_on => re.time,
                                 :comments     => re.message,
                                 :parents      => parents)
           unless cs.new_record?
-            re.paths.each { |e| cs.create_change(e) }
+            re.paths.each do |e|
+              if from_revision = e[:from_revision]
+                e[:from_revision] = from_revision[0, 12]
+              end
+              cs.create_change(e)
+            end
           end
         end
       end
diff --git a/lib/redmine/scm/adapters/mercurial/hg-template-1.0.tmpl b/lib/redmine/scm/adapters/mercurial/hg-template-1.0.tmpl
index a2a324ba2..b5b4e9203 100644
--- a/lib/redmine/scm/adapters/mercurial/hg-template-1.0.tmpl
+++ b/lib/redmine/scm/adapters/mercurial/hg-template-1.0.tmpl
@@ -1,12 +1,12 @@
 changeset = 'This template must be used with --debug option\n'
 changeset_quiet =  'This template must be used with --debug option\n'
 changeset_verbose = 'This template must be used with --debug option\n'
-changeset_debug = '<logentry revision="{rev}" node="{node|short}">\n<author>{author|escape}</author>\n<date>{date|isodatesec}</date>\n<paths>\n{file_mods}{file_adds}{file_dels}{file_copies}</paths>\n<msg>{desc|escape}</msg>\n<parents>\n{parents}</parents>\n</logentry>\n\n'
+changeset_debug = '<logentry revision="{rev}" node="{node}">\n<author>{author|escape}</author>\n<date>{date|isodatesec}</date>\n<paths>\n{file_mods}{file_adds}{file_dels}{file_copies}</paths>\n<msg>{desc|escape}</msg>\n<parents>\n{parents}</parents>\n</logentry>\n\n'
 
 file_mod = '<path action="M">{file_mod|urlescape}</path>\n'
 file_add = '<path action="A">{file_add|urlescape}</path>\n'
 file_del = '<path action="D">{file_del|urlescape}</path>\n'
 file_copy = '<path-copied copyfrom-path="{source|urlescape}">{name|urlescape}</path-copied>\n'
-parent = '<parent>{node|short}</parent>\n'
+parent = '<parent>{node}</parent>\n'
 header='<?xml version="1.0" encoding="UTF-8" ?>\n<log>\n\n'
 # footer="</log>"
diff --git a/lib/redmine/scm/adapters/mercurial/redminehelper.py b/lib/redmine/scm/adapters/mercurial/redminehelper.py
index bd82c0020..a3a8d802f 100644
--- a/lib/redmine/scm/adapters/mercurial/redminehelper.py
+++ b/lib/redmine/scm/adapters/mercurial/redminehelper.py
@@ -16,7 +16,7 @@ I/O encoding:
 :file path: urlencoded, raw string
 :tag name: utf-8
 :branch name: utf-8
-:node: 12-digits (short) hex string
+:node: hex string
 
 Output example of rhsummary::
 
@@ -60,7 +60,7 @@ def _tip(ui, repo):
             return repo.changelog.count() - 1
     tipctx = repo.changectx(tiprev())
     ui.write('<tip revision="%d" node="%s"/>\n'
-             % (tipctx.rev(), _x(node.short(tipctx.node()))))
+             % (tipctx.rev(), _x(node.hex(tipctx.node()))))
 
 _SPECIAL_TAGS = ('tip',)
 
@@ -74,7 +74,7 @@ def _tags(ui, repo):
         except error.LookupError:
             continue
         ui.write('<tag revision="%d" node="%s" name="%s"/>\n'
-                 % (r, _x(node.short(n)), _x(t)))
+                 % (r, _x(node.hex(n)), _x(t)))
 
 def _branches(ui, repo):
     # see mercurial/commands.py:branches
@@ -89,7 +89,7 @@ def _branches(ui, repo):
     for t, n, r in sorted(iterbranches(), key=lambda e: e[2], reverse=True):
         if repo.lookup(r) in branchheads(t):
             ui.write('<branch revision="%d" node="%s" name="%s"/>\n'
-                     % (r, _x(node.short(n)), _x(t)))
+                     % (r, _x(node.hex(n)), _x(t)))
 
 def _manifest(ui, repo, path, rev):
     ctx = repo.changectx(rev)
@@ -114,7 +114,7 @@ def _manifest(ui, repo, path, rev):
             tm, tzoffset = fctx.date()
             ui.write('<file name="%s" revision="%d" node="%s" '
                      'time="%d" size="%d"/>\n'
-                     % (_u(name), fctx.rev(), _x(node.short(fctx.node())),
+                     % (_u(name), fctx.rev(), _x(node.hex(fctx.node())),
                         tm, fctx.size(), ))
 
     ui.write('</manifest>\n')
diff --git a/lib/redmine/scm/adapters/mercurial_adapter.rb b/lib/redmine/scm/adapters/mercurial_adapter.rb
index f82af1a59..881fdc89c 100644
--- a/lib/redmine/scm/adapters/mercurial_adapter.rb
+++ b/lib/redmine/scm/adapters/mercurial_adapter.rb
@@ -219,7 +219,7 @@ module Redmine
             end.sort { |a, b| a[:path] <=> b[:path] }
             parents_ary = []
             as_ary(le['parents']['parent']).map do |par|
-              parents_ary << par['__content__'] if par['__content__'] != "000000000000"
+              parents_ary << par['__content__'] if par['__content__'] != "0000000000000000000000000000000000000000"
             end
             yield Revision.new(:revision => le['revision'],
                                :scmid    => le['node'],
@@ -234,7 +234,7 @@ module Redmine
 
         # Returns list of nodes in the specified branch
         def nodes_in_branch(branch, options={})
-          hg_args = ['rhlog', '--template', '{node|short}\n', '--rhbranch', CGI.escape(branch)]
+          hg_args = ['rhlog', '--template', '{node}\n', '--rhbranch', CGI.escape(branch)]
           hg_args << '--from' << CGI.escape(branch)
           hg_args << '--to'   << '0'
           hg_args << '--limit' << options[:limit] if options[:limit]
diff --git a/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb b/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
index 67c7745b8..ae5d94d61 100644
--- a/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
+++ b/test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
@@ -90,7 +90,7 @@ begin
           repo_path =  adp.info.root_url.gsub(/\\/, "/")
           assert_equal REPOSITORY_PATH, repo_path
           assert_equal '31', adp.info.lastrev.revision
-          assert_equal '31eeee7395c8',adp.info.lastrev.scmid
+          assert_equal '31eeee7395c8c78e66dd54c50addd078d10b2355',adp.info.lastrev.scmid
         end
       end
 
@@ -98,14 +98,14 @@ begin
         revisions = @adapter.revisions(nil, 2, 4)
         assert_equal 3, revisions.size
         assert_equal '2', revisions[0].revision
-        assert_equal '400bb8672109', revisions[0].scmid
+        assert_equal '400bb86721098697c7d17b3724c794c57636de70', revisions[0].scmid
         assert_equal '4', revisions[2].revision
-        assert_equal 'def6d2f1254a', revisions[2].scmid
+        assert_equal 'def6d2f1254a56fb8fbe9ec3b5c0451674dbd8b8', revisions[2].scmid
 
         revisions = @adapter.revisions(nil, 2, 4, {:limit => 2})
         assert_equal 2, revisions.size
         assert_equal '2', revisions[0].revision
-        assert_equal '400bb8672109', revisions[0].scmid
+        assert_equal '400bb86721098697c7d17b3724c794c57636de70', revisions[0].scmid
       end
 
       def test_parents
@@ -115,12 +115,12 @@ begin
         revs2 = @adapter.revisions(nil, 1, 1)
         assert_equal 1, revs2.size
         assert_equal 1, revs2[0].parents.size
-        assert_equal "0885933ad4f6", revs2[0].parents[0]
+        assert_equal "0885933ad4f68d77c2649cd11f8311276e7ef7ce", revs2[0].parents[0]
         revs3 = @adapter.revisions(nil, 30, 30)
         assert_equal 1, revs3.size
         assert_equal 2, revs3[0].parents.size
-        assert_equal "a94b0528f24f", revs3[0].parents[0]
-        assert_equal "3a330eb32958", revs3[0].parents[1]
+        assert_equal "a94b0528f24fe05ebaef496ae0500bb050772e36", revs3[0].parents[0]
+        assert_equal "3a330eb329586ea2adb3f83237c23310e744ebe9", revs3[0].parents[1]
       end
 
       def test_diff
@@ -213,7 +213,7 @@ begin
           assert_equal 'file', readme.kind
           assert_equal 27, readme.size
           assert_equal '1', readme.lastrev.revision
-          assert_equal '9d5b5b004199', readme.lastrev.identifier
+          assert_equal '9d5b5b00419901478496242e0768deba1ce8c51e', readme.lastrev.identifier
           # 2007-12-14 10:24:01 +0100
           assert_equal Time.gm(2007, 12, 14, 9, 24, 1), readme.lastrev.time
 
@@ -242,7 +242,7 @@ begin
         assert_equal 'file', readme.kind
         assert_equal 21, readme.size
         assert_equal '0', readme.lastrev.revision
-        assert_equal '0885933ad4f6', readme.lastrev.identifier
+        assert_equal '0885933ad4f68d77c2649cd11f8311276e7ef7ce', readme.lastrev.identifier
         # 2007-12-14 10:22:52 +0100
         assert_equal Time.gm(2007, 12, 14, 9, 22, 52), readme.lastrev.time
       end
@@ -260,7 +260,7 @@ begin
         assert_equal 'file', readme.kind
         assert_equal 365, readme.size
         assert_equal '8', readme.lastrev.revision
-        assert_equal 'c51f5bb613cd', readme.lastrev.identifier
+        assert_equal 'c51f5bb613cd60793c2a9fe9df29332e74bb949f', readme.lastrev.identifier
         # 2001-02-01 00:00:00 -0900
         assert_equal Time.gm(2001, 2, 1, 9, 0, 0), readme.lastrev.time
       end
@@ -288,9 +288,9 @@ begin
 
       def test_tagmap
         tm = {
-          @tag_char_1         => 'adf805632193',
-          'tag_test.00'       => '6987191f453a',
-          'tag-init-revision' => '0885933ad4f6',
+          @tag_char_1         => 'adf805632193500ad3b615cd04f58f9b0769f576',
+          'tag_test.00'       => '6987191f453a5f6557018d522feea2c450d5588d',
+          'tag-init-revision' => '0885933ad4f68d77c2649cd11f8311276e7ef7ce',
           }
         assert_equal tm, @adapter.tagmap
       end
@@ -303,36 +303,36 @@ begin
         assert_equal 7, brs.length
         assert_equal 'default', brs[0].to_s
         assert_equal '31', brs[0].revision
-        assert_equal '31eeee7395c8', brs[0].scmid
+        assert_equal '31eeee7395c8c78e66dd54c50addd078d10b2355', brs[0].scmid
         assert_equal 'test-branch-01', brs[1].to_s
         assert_equal '30', brs[1].revision
-        assert_equal 'ad4dc4f80284', brs[1].scmid
+        assert_equal 'ad4dc4f80284a4f9168b77e0b6de288e5d207ee7', brs[1].scmid
         assert_equal @branch_char_1, brs[2].to_s
         assert_equal '27', brs[2].revision
-        assert_equal '7bbf4c738e71', brs[2].scmid
+        assert_equal '7bbf4c738e7145149d2e5eb1eed1d3a8ddd3b914', brs[2].scmid
         assert_equal 'branch (1)[2]&,%.-3_4', brs[3].to_s
         assert_equal '25', brs[3].revision
-        assert_equal 'afc61e85bde7', brs[3].scmid
+        assert_equal 'afc61e85bde74de930e5846c8451bd55b5bafc9c', brs[3].scmid
         assert_equal @branch_char_0, brs[4].to_s
         assert_equal '23', brs[4].revision
-        assert_equal 'c8d3e4887474', brs[4].scmid
+        assert_equal 'c8d3e4887474af6a589190140508037ebaa9d9c3', brs[4].scmid
         assert_equal 'test_branch.latin-1', brs[5].to_s
         assert_equal '22', brs[5].revision
-        assert_equal 'c2ffe7da686a', brs[5].scmid
+        assert_equal 'c2ffe7da686aa3d956e59f2a2854cf8980a8b768', brs[5].scmid
         assert_equal 'test-branch-00', brs[6].to_s
         assert_equal '13', brs[6].revision
-        assert_equal '3a330eb32958', brs[6].scmid
+        assert_equal '3a330eb329586ea2adb3f83237c23310e744ebe9', brs[6].scmid
       end
 
       def test_branchmap
         bm = {
-           'default'               => '31eeee7395c8',
-           'test_branch.latin-1'   => 'c2ffe7da686a',
-           'branch (1)[2]&,%.-3_4' => 'afc61e85bde7',
-           'test-branch-00'        => '3a330eb32958',
-           "test-branch-01"        => 'ad4dc4f80284',
-           @branch_char_0          => 'c8d3e4887474',
-           @branch_char_1          => '7bbf4c738e71',
+           'default'               => '31eeee7395c8c78e66dd54c50addd078d10b2355',
+           'test_branch.latin-1'   => 'c2ffe7da686aa3d956e59f2a2854cf8980a8b768',
+           'branch (1)[2]&,%.-3_4' => 'afc61e85bde74de930e5846c8451bd55b5bafc9c',
+           'test-branch-00'        => '3a330eb329586ea2adb3f83237c23310e744ebe9',
+           "test-branch-01"        => 'ad4dc4f80284a4f9168b77e0b6de288e5d207ee7',
+           @branch_char_0          => 'c8d3e4887474af6a589190140508037ebaa9d9c3',
+           @branch_char_1          => '7bbf4c738e7145149d2e5eb1eed1d3a8ddd3b914',
          }
         assert_equal bm, @adapter.branchmap
       end
@@ -378,18 +378,18 @@ begin
             when 'branch (1)[2]&,%.-3_4'
               if @adapter.class.client_version_above?([1, 6])
                 assert_equal 3, nib0.size
-                assert_equal nib0[0], 'afc61e85bde7'
+                assert_equal 'afc61e85bde74de930e5846c8451bd55b5bafc9c', nib0[0]
                 nib2 = @adapter.nodes_in_branch(bra, :limit => 2)
                 assert_equal 2, nib2.size
-                assert_equal nib2[1], '933ca60293d7'
+                assert_equal '933ca60293d78f7c7979dd123cc0c02431683575', nib2[1]
               end
             when @branch_char_1
               if @adapter.class.client_version_above?([1, 6])
                 assert_equal 2, nib0.size
-                assert_equal nib0[1], '08ff3227303e'
+                assert_equal '08ff3227303ec0dfcc818efa8e9cc652fe81859f', nib0[1]
                 nib2 = @adapter.nodes_in_branch(bra, :limit => 1)
                 assert_equal 1, nib2.size
-                assert_equal nib2[0], '7bbf4c738e71'
+                assert_equal '7bbf4c738e7145149d2e5eb1eed1d3a8ddd3b914', nib2[0]
               end
           end
         end