diff --git a/last_commit.txt b/last_commit.txt
index ac169b9af0..afe1fa0c7b 100644
--- a/last_commit.txt
+++ b/last_commit.txt
@@ -1,102 +1,156 @@
-Repository: plone.app.blob
+Repository: plone.app.upgrade
 
 
 Branch: refs/heads/master
-Date: 2016-10-18T13:54:24-04:00
+Date: 2016-10-09T23:43:08+02:00
 Author: Jens W. Klein (jensens) <jk@kleinundpartner.at>
-Commit: https://github.com/plone/plone.app.blob/commit/0c954610cad6f7638382ab60d8407bd3ab1ab9f6
+Commit: https://github.com/plone/plone.app.upgrade/commit/53ae082569ea7f34fd3819c48282c3b64742978e
 
-More flexible test of getIcon.
+Products.MimetypesRegistry has no longer a skins layer, remove it.
 
 Files changed:
 M CHANGES.rst
-M src/plone/app/blob/tests/test_integration.py
+M plone/app/upgrade/v51/betas.py
+M plone/app/upgrade/v51/configure.zcml
 
 diff --git a/CHANGES.rst b/CHANGES.rst
-index 8ca2c0c..6c999d6 100644
+index 760d838..6ace74f 100644
 --- a/CHANGES.rst
 +++ b/CHANGES.rst
-@@ -17,6 +17,10 @@ Bug fixes:
- - Add coding headers on python files.
-   [gforcada]
+@@ -10,6 +10,9 @@ Breaking changes:
  
-+- More flexible test of getIcon.
+ New features:
+ 
++- Products.MimetypesRegistry has no longer a skins layer, remove it.
 +  [jensens]
 +
+ - Add sort_on field to search controlpanel.
+   [rodfersou]
+ 
+diff --git a/plone/app/upgrade/v51/betas.py b/plone/app/upgrade/v51/betas.py
+index 8ba9cf5..d17b02c 100644
+--- a/plone/app/upgrade/v51/betas.py
++++ b/plone/app/upgrade/v51/betas.py
+@@ -1,4 +1,5 @@
+ # -*- coding: utf-8 -*-
++from plone.app.upgrade.utils import cleanUpSkinsTool
+ from plone.app.upgrade.utils import loadMigrationProfile
+ from plone.registry.interfaces import IRegistry
+ from Products.CMFCore.utils import getToolByName
+@@ -17,7 +18,7 @@ def to51beta1(context):
+ 
+ def addSortOnProperty(context):
+     """Add sort_on field to search controlpanel.
+-    
++
+     The default value of this field is relevance.
+     """
+     # get the old site properties
+@@ -45,3 +46,9 @@ def addSortOnProperty(context):
+             settings.sort_on = 'relevance'
+         logger.log(logging.INFO,
+                    "Added 'sort_on' property to site_properties.")
 +
- 1.6.4 (2016-08-12)
- ------------------
++
++def remove_leftover_skin_layers(context):
++    """Products.MimetypesRegistry no longer has a skin layer, remove it.
++    """
++    cleanUpSkinsTool(context)
+diff --git a/plone/app/upgrade/v51/configure.zcml b/plone/app/upgrade/v51/configure.zcml
+index 53b8399..6e2dcc9 100644
+--- a/plone/app/upgrade/v51/configure.zcml
++++ b/plone/app/upgrade/v51/configure.zcml
+@@ -57,6 +57,12 @@ Add new Mockup 2.4.0 relateditems resource url.
+            handler=".betas.addSortOnProperty"
+            />
  
-diff --git a/src/plone/app/blob/tests/test_integration.py b/src/plone/app/blob/tests/test_integration.py
-index df26a73..83679b1 100644
---- a/src/plone/app/blob/tests/test_integration.py
-+++ b/src/plone/app/blob/tests/test_integration.py
-@@ -153,11 +153,11 @@ def testRangeSupport(self):
-     def testIcon(self):
-         blob = self.folder.blob
-         blob.update(file=getImage())
--        self.assertEqual(blob.getIcon(), 'plone/image.png')
-+        self.assertTrue(blob.getIcon().endswith('image.png'))
-         blob.update(file=pdf_data)
--        self.assertEqual(blob.getIcon(), 'plone/pdf.png')
-+        self.assertTrue(blob.getIcon().endswith('pdf.png'))
-         blob.update(file='some text...')
--        self.assertEqual(blob.getIcon(), 'plone/txt.png')
-+        self.assertTrue(blob.getIcon().endswith('txt.png'))
++      <gs:upgradeStep
++           title="Remove skins layer converted to browser resources"
++           description="Products.MimetypesRegistry Icons no longer with skins"
++           handler=".betas.remove_leftover_skin_layers"
++           />
++
+     </gs:upgradeSteps>
  
-     def testIconLookupForUnknownMimeType(self):
-         """ test for http://plone.org/products/plone.app.blob/issues/1 """
+ </configure>
 
 
-Repository: plone.app.blob
+Repository: plone.app.upgrade
 
 
 Branch: refs/heads/master
-Date: 2016-10-18T16:22:30-04:00
-Author: Jens W. Klein (jensens) <jk@kleinundpartner.at>
-Commit: https://github.com/plone/plone.app.blob/commit/ce1285f5c1d652ba9afcf10dffb83392e1e4944f
+Date: 2016-10-18T16:31:41-04:00
+Author: agitator (agitator) <hpeter@agitator.com>
+Commit: https://github.com/plone/plone.app.upgrade/commit/299c160da43431b57ac535aec41cb7632fa7211f
 
-Merge pull request #32 from plone/more-flexible-icon-test
+Merge pull request #90 from plone/remove-skins-of-mtr
 
-More flexible test of getIcon.
+Products.MimetypesRegistry has no longer a skins layer, remove it.
 
 Files changed:
 M CHANGES.rst
-M src/plone/app/blob/tests/test_integration.py
+M plone/app/upgrade/v51/betas.py
+M plone/app/upgrade/v51/configure.zcml
 
 diff --git a/CHANGES.rst b/CHANGES.rst
-index 8ca2c0c..6c999d6 100644
+index 760d838..6ace74f 100644
 --- a/CHANGES.rst
 +++ b/CHANGES.rst
-@@ -17,6 +17,10 @@ Bug fixes:
- - Add coding headers on python files.
-   [gforcada]
+@@ -10,6 +10,9 @@ Breaking changes:
  
-+- More flexible test of getIcon.
+ New features:
+ 
++- Products.MimetypesRegistry has no longer a skins layer, remove it.
 +  [jensens]
++
+ - Add sort_on field to search controlpanel.
+   [rodfersou]
+ 
+diff --git a/plone/app/upgrade/v51/betas.py b/plone/app/upgrade/v51/betas.py
+index 8ba9cf5..d17b02c 100644
+--- a/plone/app/upgrade/v51/betas.py
++++ b/plone/app/upgrade/v51/betas.py
+@@ -1,4 +1,5 @@
+ # -*- coding: utf-8 -*-
++from plone.app.upgrade.utils import cleanUpSkinsTool
+ from plone.app.upgrade.utils import loadMigrationProfile
+ from plone.registry.interfaces import IRegistry
+ from Products.CMFCore.utils import getToolByName
+@@ -17,7 +18,7 @@ def to51beta1(context):
+ 
+ def addSortOnProperty(context):
+     """Add sort_on field to search controlpanel.
+-    
++
+     The default value of this field is relevance.
+     """
+     # get the old site properties
+@@ -45,3 +46,9 @@ def addSortOnProperty(context):
+             settings.sort_on = 'relevance'
+         logger.log(logging.INFO,
+                    "Added 'sort_on' property to site_properties.")
 +
 +
- 1.6.4 (2016-08-12)
- ------------------
++def remove_leftover_skin_layers(context):
++    """Products.MimetypesRegistry no longer has a skin layer, remove it.
++    """
++    cleanUpSkinsTool(context)
+diff --git a/plone/app/upgrade/v51/configure.zcml b/plone/app/upgrade/v51/configure.zcml
+index 53b8399..6e2dcc9 100644
+--- a/plone/app/upgrade/v51/configure.zcml
++++ b/plone/app/upgrade/v51/configure.zcml
+@@ -57,6 +57,12 @@ Add new Mockup 2.4.0 relateditems resource url.
+            handler=".betas.addSortOnProperty"
+            />
  
-diff --git a/src/plone/app/blob/tests/test_integration.py b/src/plone/app/blob/tests/test_integration.py
-index df26a73..83679b1 100644
---- a/src/plone/app/blob/tests/test_integration.py
-+++ b/src/plone/app/blob/tests/test_integration.py
-@@ -153,11 +153,11 @@ def testRangeSupport(self):
-     def testIcon(self):
-         blob = self.folder.blob
-         blob.update(file=getImage())
--        self.assertEqual(blob.getIcon(), 'plone/image.png')
-+        self.assertTrue(blob.getIcon().endswith('image.png'))
-         blob.update(file=pdf_data)
--        self.assertEqual(blob.getIcon(), 'plone/pdf.png')
-+        self.assertTrue(blob.getIcon().endswith('pdf.png'))
-         blob.update(file='some text...')
--        self.assertEqual(blob.getIcon(), 'plone/txt.png')
-+        self.assertTrue(blob.getIcon().endswith('txt.png'))
++      <gs:upgradeStep
++           title="Remove skins layer converted to browser resources"
++           description="Products.MimetypesRegistry Icons no longer with skins"
++           handler=".betas.remove_leftover_skin_layers"
++           />
++
+     </gs:upgradeSteps>
  
-     def testIconLookupForUnknownMimeType(self):
-         """ test for http://plone.org/products/plone.app.blob/issues/1 """
+ </configure>