[eluser]BrianDHall[/eluser]
Hm...well for the last 3 days I've been working on custom file upload functions (and a multi-file uploader using flash/javascript that saves images into the database for dynamic recreation and with multiple associations... which was an unexpectedly tricky), so I already have basic test functions in place. If you'd like to send me a sample uvc file I'll happily test it on my system and report what I find.
I found the key to figuring out what was going on with mine was using a debugger, stepping line by line through the code, and Stepping Into the file uploader class to see what went wrong. I ended up running into a MIME problem myself (uploading an image with flash does not result in an image mime, but an application/octetstream mime...tricky!)