User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; rv:1.7.3) Gecko/20041001 Firefox/0.10.1 Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; rv:1.7.3) Gecko/20041001 Firefox/0.10.1 Self-explanatory, see pic. in URL. In Panther, (Mac OS X 10.3.5), when pressing either F9, or F10 to activate Exposé (a fairly new feature that shows all open windows), there is a hidden, unlabeled window in the upper-left corner of the screen, about 200 pixels in length, 180 in width. This has been a problem since the first version of Firefox for Mac, as well as the first version of Panther. Reproducible: Always Steps to Reproduce: 1. Press F9 or F10 while Firefox is open with Mac OS X 10.3 and above. Actual Results: Same as description. Expected Results: Exposé shows all open windows you currently have on your desktop, not minimized windows. In the case of the picture of the URL, I had only one Firefox window open, and it showed two windows, the one I had, and the mysterious hidden window. It should have only showed the window(s) I had open. Occurs with Default Theme, iBook G4, also does it on iMac G4. Nothing unusual going on in the background.

*** This bug has been marked as a duplicate of 223545 ***