Ever since installing v1.62, I've had a lot of problems with my TP (using the original ROM). I recently switched to PocketShield and I don't see the same problems anymore.
List of problems:
Lost calls
Random pinwheels (middle circle when app opens)
Quicker battery drainage
Delayed fullscreen caller ID
You can see others with similar problems here:
http://forum.xda-developers.com/showthread.php?t=464695
Until/unless these problems are corrected or fixed, I'm staying on PocketShield. The unpaid for version has been working fine on my phone and I don't notice these problems that I had before.
A great list of other phone locks:
http://forum.ppcgeeks.com/showthread.php?t=64231
It's sad because s2u2 was a really good way to lock the phone and had so many cool features. I just can't deal with the bulkiness.