I woke up this morning to find that my display had changed and so had the look many apps. What the heck happened?
Did your phone receive the Ice Cream Sandwich operating system update overnight, maybe?
HTC ThunderBolt - Ice Cream Sandwich
How would I know?
Sorry, I just realized that might not have sounded very nice. I meant it literally. How would I know if an update had occurred?
Looks like there's been an additional update:
http://support.verizonwireless.com/pdf/system_update/thunderbolt.pdf
According to that link, your system number should be 7.02.605.10. It's found in the About Phone (or maybe it's About Device on your phone) section of your Settings.