diff --git a/app/models/auth_source.rb b/app/models/auth_source.rb
index a0a2cdc5..537ed2d4 100644
--- a/app/models/auth_source.rb
+++ b/app/models/auth_source.rb
@@ -38,7 +38,8 @@ class AuthSource < ActiveRecord::Base
       begin
         logger.debug "Authenticating '#{login}' against '#{source.name}'" if logger && logger.debug?
         attrs = source.authenticate(login, password)
-      rescue
+      rescue => e
+        logger.error "Error during authentication: #{e.message}"
         attrs = nil
       end
       return attrs if attrs
diff --git a/app/models/auth_source_ldap.rb b/app/models/auth_source_ldap.rb
index 6203a7c8..a619b2f8 100644
--- a/app/models/auth_source_ldap.rb
+++ b/app/models/auth_source_ldap.rb
@@ -91,6 +91,8 @@ class AuthSourceLdap < AuthSource
   end
   
   def self.get_attr(entry, attr_name)
-    entry[attr_name].is_a?(Array) ? entry[attr_name].first : entry[attr_name]
+    if !attr_name.blank?
+      entry[attr_name].is_a?(Array) ? entry[attr_name].first : entry[attr_name]
+    end
   end
 end