Try deleting all of the files in the '..\Divine Divinity\Run\Dynamic' folder.
This folder is used as a cache for the game. Files are created / copied there from the save game folder when you load, and written / copied from that folder when you save a game. The files will be re-created as required the next time you start Divinity. If there was a corrupt file in that folder, deleting the files should fix the problem.
After this, start Divinity and re-load the previous save.
I'll find a save for the inventory files in the morning, if the above doesn't work. <img src="/ubbthreads/images/graemlins/sleepey.gif" alt="" />