HTC has released 2 hotfixes for the HTC HD2. The updates are for all ROM versions and includes a security update.
1. Update for HTC HD2 Facebook Albums
According to the description, "this update for your phoneâ€™s Facebook client restores the ability to view your friendsâ€™ photo albums". I personally never had any issues with Facebook photo albums.
2. Update for HTC HD2 Java Message Pop up
Hotfixes of course do not wipe your data, but a quick backup via My Phone may still be in order.