I've been getting the same thing for a while now whenever I try to make a post on my ipad (sometimes it tells me that I don't have permission). What I've taken to doing is copying the text from my post before I hit send, then when I'm faced with a warning message I refresh the page, and paste my text and send again. It always works the second time.
I have been wondering if everyone else was having this issue.It seems like when i go to make a post it always expires.Like Dave said i have found out that copy and paste is your best buddy here if your lurking the forums.It even happens to me when im writing PMs. Hope to see a fix soon but if not,Just copy,refresh and paste.
Copy and paste is now automatic for me otherwise 9/10 times my post is lost. My main complaint is it has been this way since the forum was switched over at C2's launch. I'm hoping for a fix too but my guess it's caused by some inherent flaw with the forum software that is not trivial to fix.