I was using version 1.1, I clicked the zoom button, and the window turned into a vertical bar. I haven't been able to get it to expand. I tried deleting the Mozilla folder in the documents folder and restarting, deleting that folder as well as the Mozilla application folder and reinstalling, I tried reinstalling 1.0.1, and Netscape 7, and they all show the same thing - a small vertical bar where a window should be. Mozilla on System 9 is still working.
Can you try and delete localstore.rdf in your profile directory
ahh it may not be a localstore issue. Resolving as dup of bug 167663 *** This bug has been marked as a duplicate of 167663 ***