I very stronly suggest to anyone who is having a problem (even a small one) with the new version, to report their issues via the official channels.
Complaining here (or on other non-official MS forums) will not do you any good and, maybe more important, it will not do Messenger and other people having the same issues any good...
Issues can only get fixed if MS knows about it.
(and there is plenty to fix in this Beta)
So, head over to
http://windowslivehelp.com/product.aspx?productid=2
Pick the correct subforum, search quickly if your issue isn't already talked about somewhere, and post your stuff...
/ 
