Andris Valums "ajax-uploader" had a bug in it that prevented Firefox on the PC from working (but on the Mac it was ok). He has a later version that fixes this problem. It is tested as now working on Firefox v18 on WinXP. This project has actually been moth-balled and is over two years old and can be considered "v1." He later created a "v2" product called "file-uploader." And now he has a version 3 product called "fine-uploader" as in "man she is *fine*". It may be worth upgrading to "v3" but for now I'm just applying the latest fixes for version 1 since it fixes the problem.