Board Thread:Consensus track/@comment-13872611-20130729230120/@comment-4787430-20130729231837

Also, I should point out if your file has a generic name, such as "Screenshot", or begins with numbers, that could also be what's preventing you from uploading. To be safe, name the file with a new name, without using numbers in the beginning.

If that still doesn't solve the problem, then I don't know what else it could be. It looks like uploads are working fine for other members.