--- Operating System, Graphics card ---
vista 32-bit

--- Blender version with error, and version that worked ---
r56299
r56333

--- Short description of error ---
Clamp value goes back to 0 on the new object/clone if duplicated.


--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
Shift-D to duplicate the object in the attached file.

or
1. Add solidfy modifier to any object.
2. Give Clamp a value higher than 0.
3. Duplicate the object.
4. Watch how clamp=0 on the new object.