The error comes when I hit submit, right after selecting the photos. I have tried uploading a single file, multiple files, changing the file name formats, etc, and I see the same error each time.
I have uploaded pics before with the same system and network connection without error. I do believe this is the first time I have tried since the latest Firefox update (3.6.3).
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3