When I'm creating a post (reply or topic), I can preview it only once. After that the preview button only adds a #preview anchor to my address bar. After this I can't seemingly submit the post either, I need to copy the text I've written and paste it again when reloading the submit form (as in click back and press "new topic/reply" again. Then the submit button functions properly.
Sometimes submitting an attachment seems to break the submit button too.
I need to test with a stable browser version once I get home. If this works then I'll remove this thread.

