I have been using sync to keep some important directories on my laptop backed up to a flash drive. Today I made some changes to a couple of files using another machine and copied these to my flash drive so I could sync them back to my laptop. I did a dry run with the sync /n option and discovered that 13 files would be copied from my flash drive to my laptop rather than just the two I expected. I looked at the names, timestamps, and file sizes of the 11 files that I didn't expect to see and they were identical on both the laptop and the flash drive. Just to be sure, I ran an MD5 sum on the files and these were also identical! So why would they cause a sync copy? I remember back in 4NT 8.x there was a bug with sync when comparing timestamps of files on NTFS drives with those on FAT drives, which happens to be the case here (laptop = NTFS, flash drive = FAT32). Has this bug crept back in? Or is there another problem here (perhaps on my part?). I'm running TCC 9.02.151 on Win XP SP2.