OK, I don't know if this is a bug or it is just me, but...
When I copy a cache from one database to another - by selecting the user flag for the caches I want to copy over, then UserSet filter, then copy - I go back to the original database to deselect the user flag, it won't let me deselect the flag. In fact, I can't select any other caches either. Even if I go to a different database, I can't select the user flag on any cache. I can go to User Flags --> Clear All, and they disappear, but I can't select any other ones.
I have to exit GSAK, and go back in and then everything works fine.
The same thing happens if I delete caches by using the User Flag.
Hope this makes sense.