Strange behavior of "GET INFO" command

[popeye]

After running an incremental backup, I checked my GET INFO for a jpeg and found that the program names were all duplicated in the pulldown bar. To fix this, I had to trash the LaunchServices caches in System/Library/Caches directory and restart immediately. I have replicated this behavior precisely, checking GET INFO just before and just after running an incremental backup. Running subsequent backups (I do it every day) without doing this fix produces a duplication of the application choices up to 5 each!

What gives? Anyone else had similar issues?