Hi

I've built a site on a linux machine and moved it to a windows server to go live but since its been moved if you try to upload a file it comes back with an error for invalid file. I've tried and checked a few things:

1) making sure the extension is allowed
2) that the folders all have the right permissions
3) that the tmp directory is set in the php.ini file

But none of these have helped, any other suggestions out there, the error message isn't very helpful.