Hi all: One of my websites is not allowing any uploads. An example of the error I get is...

“ 2011-02-09_131500.jpg” has failed to upload due to an error
This file exceeds the maximum upload size for this site.

I have absolutely tried everything I know of to fix it:

- Raised Quota in UI
- Checked php ini file (Allow 100megs max)

This happens in all networked sites (in this network) media uploader and Marketplace uploader.

Any Ideas on what gremlin could be causing this?