"OK" button sometimes not active in Firefox file download dialog box.
Just experienced this after today's update of Ubuntu 7.10 Gutsy:
When downloading a file in Firefox, the "OK" button in the file download dialog box sometimes is not active (i.e. "greyed out"). This happens intermittently. If you subsequently click into the de-activated "OK" button, it then becomes active and you can then click it a second time to begin the file download. This is not a serious bug, it is cosmetic in nature, but it may confuse some people.