Updating the Mozilla Firefox software to version 3.6.11 on a Mac computer causes uploading to stop working. This problem applies to Mac OS X 10.4, 10.5, and 10.6.Cause:
When you click the Upload button, nothing happens. Solution :
-Remove the Firefox 3.6.11 software and downgrade the software to version 3.6.10. An older version of Firefox is available from: ftp.mozilla.org/pub/mozilla.org/firefox/releases/
-Use the Apple Safari software If you are using Mac OS X 10.6.4, you can also use the following solution:
-Update the Java version for the Mac to version 10.6, Update 3. This appears to fix the problem.