For unknown reasons, my Preview app has stopped responding. I can double click on it or one of its supported file types, and the app icon bounces, but never opens. An old support article on MacWorld suggested I delete it's preferences from the Libary/applications file. I did this, with no result. I've also re-booted the machine, as well as repair the permissions with disk utility. What's up with this? I haven't noticed other apps wigging out like this, but wonder if it is related to a repair I did with DiskWarrior recently. Oh, and this is with OS 10.4.8 on a 12" G4 PB. Thanks in advance.