Just downloaded 23549_Beta4.1 and flashed it. So far so good, but there are some oddities with button placement, for example, when an SMS comes in, the only active button is DISMISS, no option for delete, mark as read, anything.

Also, when in HTC Messaging, viewing an SMS, there is no BACK button, instead, the BACK button has been changed to SEND. This is pretty inconvenient...

So far, those are the only 2 things I have noticed!