i was moving a pet frame around when the hunter's pet disappeared from my list (dunno why it disappeared, but i'm sure it had something to do with where the guy was -- i was in shat and we were trying to get a group together so he could have been anywhere). anyway, as i'm dragging, the pet goes away and when it comes back i got this pet on my cursor that i can't get rid of. infact, fubar fails to function so i can't even tell it to lock downt he agUF frames.
moving it around some more, pet vanishes. this time i figure i'll lock before the pet comes back. same thing, fubar not responding.
seems like if an item gets hidden between mousedown and mouseup events, the mouseup never makes it to the item. not sure why it messes up fubar unless it's a library thing. i had this happen to me once with tradesbar (stuck to my cursor and killed my mouse ui interactions) but i don't think it was related to hiding anything.
i dunno the ins and outs here, but if an item is waiting for a mouse-up events, that item being hidden should probably also fire a mouseup.