I'm having a problem with saving file in Word 2007, apparently caused by Avast. I'm running on a laptop with Windows Vista Ultimate and Avast Home Edition (Build 4.7.942) both with the latest updates/patches. The Windows Vista system drive is a NTFS partition while my other partitions are FAT32.
The problem I'm facing is that whenever I create a file with Word 2007 and try to save it in my FAT32 partition, it gives me the error "Word cannot complete the save due to a file permission error", resulting in the lost of my original document file, and automatically created a "~WRLxxxx.tmp" file which cannot be deleted until reboot, xxxx is a random number. This ".tmp" file is exactly the same size as my original word document. The original file is a ".doc" file but not the latest format ".docx". However, this problem did not occur when I try to save the file in my Vista system partition, which is NTFS.
I've done some googling on the internet and found that some people are having the same problem when running Windows One Care, leading me to suspect that whether the same case happens to Avast. Hence I uninstalled Avast Home Edition and repeat the same steps above. Voila.... problem disappeared and everything appeared to have run smoothly. I can create and save all my Word 2007 documents without any problem in my FAT32 partition. However, when I reinstalled Avast, the same old problem resurface again

Note that I have also tried stopping the On-Access Protection but the problem still persisted.
I wonder if there is anyone having the same problem as I do? Is there anything I can do with Avast to resolve the problem?