So, the last few days I've had these weird lockup issues on my smooth overclocked Thunderbolt. For example, I'd be typing and it would miss characters like crazy as if I never typed them. Example: typing hahaha would result in hahhhhhahhhh because of the lockup. I noticed that during calls or incoming texts I'd have similar lockups.
Well, switching to the default htc keyboard I noticed there weren't any lockup problems. I use Smart Keyboard Pro and since it was on the SD card (move to sd) I figured there might be some issues with the SD card. About 20 minutes ago I got my first "Unexpected SD Card removal" from the Android OS after a REALLY bad lockup.
Put my Droid 1s 16GB card into my Thunderbolt, formatted it, moved everything to SD and back to normal. No lockups and I notice that everything is alot faster than it was with the 32GB card. Formatted the 32GB card with a USB to MiniSD usb key and now its servicing as a thumb drive (nothing too important for now obviously).
But just thought I'd share this to those that are experiencing similar issues.