diff --git a/release/scripts/bpymodules/BPyMessages.py b/release/scripts/bpymodules/BPyMessages.py
index dbf8d8524a3..0ff8e178ac1 100644
--- a/release/scripts/bpymodules/BPyMessages.py
+++ b/release/scripts/bpymodules/BPyMessages.py
@@ -12,7 +12,6 @@ def Error_NoMeshUvActive():
 def Error_NoMeshMultiresEdit():
 	Draw.PupMenu('Error%t|Unable to complete action with multires enabled')
 
-
 # File I/O messages
 def Error_NoFile(path):
 	'''True if file missing, False if files there
@@ -36,6 +35,18 @@ def Error_NoDir(path):
 		return True
 	return False
 
+
+def Warning_MeshDistroyLayers(mesh):
+	'''Returns true if we can continue to edit the mesh, warn when using NMesh'''
+	if len(mesh.getUVLayerNames()) >1 and len(mesh.getColorLayerNames()) >1:
+		return True
+	
+	ret = Draw.PupMenu('Warning%t|This script will distroy inactive UV and Color layers, OK?')
+	if ret == -1:
+		return False
+	
+	return True
+
 def Warning_SaveOver(path):
 	'''Returns - True to save, False dont save'''
 	if sys.exists(sys.expandpath(path)):
@@ -44,3 +55,5 @@ def Warning_SaveOver(path):
 			return False
 	
 	return True
+
+
diff --git a/release/scripts/unweld.py b/release/scripts/unweld.py
index 4fd13f647d6..89cf495181c 100644
--- a/release/scripts/unweld.py
+++ b/release/scripts/unweld.py
@@ -215,9 +215,11 @@ def collecte_edge(listf2v,me,thegood):
 
 OBJECT=Blender.Scene.GetCurrent().getActiveObject()
 
-if OBJECT and OBJECT.getType()=='Mesh':
+if OBJECT and OBJECT.type=='Mesh':
 	if OBJECT.getData(mesh=1).multires:
 		BPyMessages.Error_NoMeshMultiresEdit()
+	elif not BPyMessages.Warning_MeshDistroyLayers(OBJECT.getData(mesh=1)):
+		pass
 	else:
 		EDITMODE=Blender.Window.EditMode()
 		Blender.Window.EditMode(0)
diff --git a/source/blender/python/api2_2x/doc/API_intro.py b/source/blender/python/api2_2x/doc/API_intro.py
index 4e2c71f3afc..74022f45d9c 100644
--- a/source/blender/python/api2_2x/doc/API_intro.py
+++ b/source/blender/python/api2_2x/doc/API_intro.py
@@ -12,7 +12,7 @@ The Blender Python API Reference
 	-----------
 
 		- L{Blender}
-		- L{bpy<Bpy>}
+		- L{bpy<Bpy>} (experemantal)
 
 	Submodules:
 	-----------
@@ -39,7 +39,7 @@ The Blender Python API Reference
 		- L{Mesh} (*)
 		  - L{MeshPrimitives} (*)
 		- L{Metaball} (*)
-		- L{NMesh} (*)
+		- L{NMesh} (deprecated)
 		- L{Noise}
 		- L{Object} (*)
 			- L{Modifier} (*)
@@ -235,8 +235,6 @@ A note to newbie script writers:
 @see: U{www.python.org<http://www.python.org>}
 @see: U{www.python.org/doc<http://www.python.org/doc>}
 @see: U{Blending into Python<en.wikibooks.org/wiki/Blender_3D:_Blending_Into_Python>}: User contributed documentation, featuring a blender/python cookbook with many examples.
-@note: this documentation was generated by epydoc, which can output html and
-	  pdf.  For pdf it requires a working LaTeX environment.
 
 @note: the official version of this reference guide is only updated for each
 	new Blender release.  But you can build the current CVS
diff --git a/source/blender/python/api2_2x/doc/NMesh.py b/source/blender/python/api2_2x/doc/NMesh.py
index 464d057a06e..aa52400656f 100644
--- a/source/blender/python/api2_2x/doc/NMesh.py
+++ b/source/blender/python/api2_2x/doc/NMesh.py
@@ -3,12 +3,14 @@
 """
 The Blender.NMesh submodule.
 
-B{New}:
- - edges class (L{NMEdge}) and nmesh methods (L{NMesh.NMesh.addEdge}, etc.);
- - new optional arguments to L{NMesh.NMesh.update};
- - L{NMesh.NMesh.transform};
- - L{GetNames};
- - L{GetRawFromObject} supports Surface/Curve/Text/Meta objects
+B{Deprecated}:
+This module is now maintained but not actively developed.
+
+Access to data such as properties, library, UVLayers and ColorLayers is not available
+further more, a mesh modified with NMesh will destroy inactive UV and Color layers
+so writing tools that use NMesh is discouraged.
+
+Use L{Mesh} instead.
 
 Mesh Data
 =========