I'm now getting duplicates of SMS, some with an added tag line that says
(tx: 7:12 / rx: 12:12)
The message was actually sent at 12:12, and I've got one copy with this tx/rx tag, and one without - the second one has the 12:12 time.
Plus, there's long been a problem with Handcent that if you read a message that was sent by email, it changes the receive time to the time you read it, and that time sticks until you open the thread in the built-in app. This has not changed. Handcent flashes a "draft" message, but doesn't actually create one. This messes up the sequence of SMS.
And the built-in messaging app has gotten uglier - bigger fonts for the contact, and I hate the bubbles.