i've had the same thing this morning, can't erply to a post, but can edit one in the thread
although i'm unsure as to what happened, i think it may be something to do with the post i was trying to post to being open all night
still doesn't explain why i have been able to edit it and the edit has come up, but still with the token expired reply
i'll post up a pic of it and see if someone may be able to shed some light on it
it's not happened for several days now but when it does happen, it tends to happen to aseveral posts in a row, and then it mysteriously dissapears again