Strange upload problem


I’m using file_column to upload files to the server.
I can upload everything, except .jpg and .png (the two formats I need).
If I try to trick the server and replace the extension, it doesn’t work.
I assume the mime type is used.

The strange part is that everything works fine on my windows box in
I’m on fedora with rails 1.1.6 and 1 mongrel instance proxyed by apache.

I would think it comes from the server, but I’m no linux pro and it’s
way out of my knowledge.

If someone has a pointer, I’m open to everything.

Thanx in advance


ps: the site is (just in case)