Changing the upload_max_filesize in the php.ini appears to have fixed the issue with Firefox, Chrome, and Safari on my OS X Lion system. I thought I had already changed but must have been another site of mine! Thanks!
I am using hostmonster.com. Can I change my php.ini?
I feel it is the size of the files. Most small files, under 10mb works but larger ones do not. Is there a way to increase the file size limit. I looked at your code and it seems like it is set 1000M. Thanks!