Yes, in fact there are some problems/bugs with 6.2 and that's why Microsoft hasn't released publicly 6.2 yet. It's been said M$ will release it on Monday. I'd suggest you to stay with 6.1 and wait until M$ puts 6.2 in
http://messenger.msn.com (and not in
http://messenger.msn-int.com which is an internal site for M$'s betas)