Some other users reported having this problem in one of the MAC threads I think and I seem to be having it also. If I try to quote someone and type, it won't recognise my spacebar and the words flow on without spaces. I can type one word, hit enter for another line and the spacebar will work in the line immediately beneath it but if I just hit enter to go down one space it doesn't recognise the space bar. It's like there has to be typed content in the line above for it to recognise the spacebar. I'm not having it in all the threads but the Mac x Mariah Carey collection thread is one I recall having the issue.