diff --git a/rhodecode/controllers/admin/repos.py b/rhodecode/controllers/admin/repos.py
--- a/rhodecode/controllers/admin/repos.py
+++ b/rhodecode/controllers/admin/repos.py
@@ -254,7 +254,7 @@ class ReposController(BaseController):
             h.flash(_('deleted repository %s') % repo_name, category='success')
             Session.commit()
         except IntegrityError, e:
-            if e.message.find('repositories_fork_id_fkey'):
+            if e.message.find('repositories_fork_id_fkey') != -1:
                 log.error(traceback.format_exc())
                 h.flash(_('Cannot delete %s it still contains attached '
                           'forks') % repo_name,
diff --git a/rhodecode/controllers/admin/repos_groups.py b/rhodecode/controllers/admin/repos_groups.py
--- a/rhodecode/controllers/admin/repos_groups.py
+++ b/rhodecode/controllers/admin/repos_groups.py
@@ -162,7 +162,7 @@ class ReposGroupsController(BaseControll
             h.flash(_('removed repos group %s' % gr.group_name), category='success')
             #TODO: in future action_logger(, '', '', '', self.sa)
         except IntegrityError, e:
-            if e.message.find('groups_group_parent_id_fkey'):
+            if e.message.find('groups_group_parent_id_fkey') != -1:
                 log.error(traceback.format_exc())
                 h.flash(_('Cannot delete this group it still contains '
                           'subgroups'),
diff --git a/rhodecode/controllers/changeset.py b/rhodecode/controllers/changeset.py
--- a/rhodecode/controllers/changeset.py
+++ b/rhodecode/controllers/changeset.py
@@ -59,7 +59,7 @@ class ChangesetController(BaseRepoContro
         c.affected_files_cut_off = 60
 
     def index(self, revision):
-
+        ignore_whitespace = request.GET.get('ignorews') == '1'
         def wrap_to_table(str):
 
             return '''<table class="code-difftable">
@@ -130,7 +130,8 @@ class ChangesetController(BaseRepoContro
                     # made
                     c.sum_added += node.size
                     if c.sum_added < self.cut_off_limit:
-                        f_gitdiff = differ.get_gitdiff(filenode_old, node)
+                        f_gitdiff = differ.get_gitdiff(filenode_old, node,
+                                           ignore_whitespace=ignore_whitespace)
                         d = differ.DiffProcessor(f_gitdiff, format='gitdiff')
 
                         st = d.stat()
@@ -168,7 +169,8 @@ class ChangesetController(BaseRepoContro
                     else:
 
                         if c.sum_removed < self.cut_off_limit:
-                            f_gitdiff = differ.get_gitdiff(filenode_old, node)
+                            f_gitdiff = differ.get_gitdiff(filenode_old, node,
+                                           ignore_whitespace=ignore_whitespace)
                             d = differ.DiffProcessor(f_gitdiff,
                                                      format='gitdiff')
                             st = d.stat()
@@ -219,6 +221,7 @@ class ChangesetController(BaseRepoContro
     def raw_changeset(self, revision):
 
         method = request.GET.get('diff', 'show')
+        ignore_whitespace = request.GET.get('ignorews') == '1'
         try:
             c.scm_type = c.rhodecode_repo.alias
             c.changeset = c.rhodecode_repo.get_changeset(revision)
@@ -237,7 +240,8 @@ class ChangesetController(BaseRepoContro
                 if filenode_old.is_binary or node.is_binary:
                     diff = _('binary file') + '\n'
                 else:
-                    f_gitdiff = differ.get_gitdiff(filenode_old, node)
+                    f_gitdiff = differ.get_gitdiff(filenode_old, node,
+                                           ignore_whitespace=ignore_whitespace)
                     diff = differ.DiffProcessor(f_gitdiff,
                                                 format='gitdiff').raw_diff()
 
@@ -250,7 +254,8 @@ class ChangesetController(BaseRepoContro
                 if filenode_old.is_binary or node.is_binary:
                     diff = _('binary file')
                 else:
-                    f_gitdiff = differ.get_gitdiff(filenode_old, node)
+                    f_gitdiff = differ.get_gitdiff(filenode_old, node,
+                                           ignore_whitespace=ignore_whitespace)
                     diff = differ.DiffProcessor(f_gitdiff,
                                                 format='gitdiff').raw_diff()
 
diff --git a/rhodecode/controllers/files.py b/rhodecode/controllers/files.py
--- a/rhodecode/controllers/files.py
+++ b/rhodecode/controllers/files.py
@@ -404,6 +404,7 @@ class FilesController(BaseRepoController
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def diff(self, repo_name, f_path):
+        ignore_whitespace = request.GET.get('ignorews') == '1'
         diff1 = request.GET.get('diff1')
         diff2 = request.GET.get('diff2')
         c.action = request.GET.get('diff')
@@ -430,8 +431,9 @@ class FilesController(BaseRepoController
                                 repo_name=c.repo_name, f_path=f_path))
 
         if c.action == 'download':
-            diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),
-                                        format='gitdiff')
+            _diff = differ.get_gitdiff(node1, node2,
+                                       ignore_whitespace=ignore_whitespace)
+            diff = differ.DiffProcessor(_diff,format='gitdiff')
 
             diff_name = '%s_vs_%s.diff' % (diff1, diff2)
             response.content_type = 'text/plain'
@@ -440,8 +442,9 @@ class FilesController(BaseRepoController
             return diff.raw_diff()
 
         elif c.action == 'raw':
-            diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),
-                                        format='gitdiff')
+            _diff = differ.get_gitdiff(node1, node2,
+                                       ignore_whitespace=ignore_whitespace)
+            diff = differ.DiffProcessor(_diff,format='gitdiff')
             response.content_type = 'text/plain'
             return diff.raw_diff()
 
@@ -453,8 +456,9 @@ class FilesController(BaseRepoController
                 c.cur_diff = ''
                 c.big_diff = True
             else:
-                diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),
-                                        format='gitdiff')
+                _diff = differ.get_gitdiff(node1, node2,
+                                           ignore_whitespace=ignore_whitespace)
+                diff = differ.DiffProcessor(_diff,format='gitdiff')
                 c.cur_diff = diff.as_html()
         else:
 
@@ -467,8 +471,9 @@ class FilesController(BaseRepoController
                 c.big_diff = True
 
             else:
-                diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),
-                                        format='gitdiff')
+                _diff = differ.get_gitdiff(node1, node2,
+                                           ignore_whitespace=ignore_whitespace)
+                diff = differ.DiffProcessor(_diff,format='gitdiff')
                 c.cur_diff = diff.as_html()
 
         if not c.cur_diff and not c.big_diff: