2 things to check. If the sequence is long enough you will hit the windows 2 gB limit for the QT file. Are there any unrendered effects in the time line? Try rendering first.

It's IE 6 on Win 2K. Identical to home setup. I've never seen anything like it before. It's like it doesn't want me to click on anything. Maybe it's an FCP virus?

Every time I move the mouse over any hyperlink (i.e. a topic heading, subject heading etc) the page jumps away from the cursor. The only way I can get it to stay still is to right click (which brings up the menu) and then double click on the link. All pages behave normally on home PC. Any one else having this problem?