I have a Dropbox file that I share with 2 other collaborators and for some reason, I keep getting notices asking if I'm sure I want to delete a file. I didn't want to delete the file and hadn't even touched it. So I hit 'cancel' and it deletes it anyway. This has happened twice in the last week and my collaborators are getting tired of having to re-install it. Help, this is very embarassing and makes me never want to use Dropbox for collaboration again!