With the most recent version of PhotoMechanic - 4.6.1 - I find that the program sometimes slows down, and takes a while to catch up with me while browsing RAW files from my Canon1DsIII. I frequently find myself having browsed to the next picture - and THEN the delete key I pressed for the last photo suddenly kicks in, a little too late, and deletes the wrong photo. I find this behaviour really annoying, particularly because there is no simple apple+z key combo to undo the deletion. Instead I have to open and browse the trash can, and drag the file back into the original folder, which really breaks the photo-editing flow. So an undo feature for photo deletion in browse mode would be most appreciated. Thanks.