Quite often when I go to upload large files I run into an “unresponsive script” dialog box in Firefox.
This is especially true when I am working with video and/or audio files. It’s even worse when I am at home on dial-up.
Lifehacker has a great post on how to get rid of the “unresponsive script” in Firefox. I have used the tip and set my script to 20 instead of 5 and when I upload files at work I no longer run into the problem. At home is another story, but maybe I need to not upload video files over dial-up…