Noticed a few people seem to be having problems on the forum with double posts - "Submt Post" seems to be giving me some weird behaviour too - like the site just hangs instead of jumping to the new post etc. Then when I check again, the post did go through OK even though I never got a "Post submitted successfully" screen. Also seems to forget which posts are tagged as 'read' sometimes too.
Isolated connection problem, browser settings (same issue on Firefox and Chrome for me), or is the forum site a bit poorly??