Mods: I'm trying to upload some attachments in this thread, but after the first pdf uploaded fine I'm getting the "Upload of file failed." message when I try to upload another attachment. In the manage attachments popup it lists the pdf limit as "9.54 MB", which I'm certainly under [my file is just over 2mb], so maybe there is something I'm missing...
Clean out your cookies - cache' first. Then reduce the size until it posts. Try just one upload and not multiple uploads and see what happens.