I ran into a forum bug. I play via steam and when I tried uploading screenshots to the forum I couldn't close the attachments window so I had to use imgur for the pics. Is that just me, just steam users or everyone?
How to test:
"post new thread"
"manage attachments" (opens a new window)
upload a pic there
click "close window". Here the window just didn't close so I couldn't return to my post to use the pic.