I can upload attachments, so all of that seems to be working. But if the attachment is big enough that it would need to be resized, it goes through the whole upload process/status bar, and then I get a pop-up saying "upload failed". If I swap out the config files so that Nginx runs php stuff through Apache, it all works perfectly. I've checked all of the php upload size/post size/etc variables, and they look fine. I'm wondering if it's not some fcgi stuff in the nginx conf. Maybe a connection timeout problem or buffering issue... not sure. Any suggestions on where to start looking?