I get "android.process.acore" errors, where you get a popup telling you to force it to close.
This happens on first touch after power on (whether it is immediately, or you let the phone power on, lock and then unlock it).
It's then on the first time time you touch the notification bar, and in some applications (HTC Peep, People, Sesmic).
Haven't seen anyone else report it, but I'm an Australian user with a UK purchased 3week old desire. Stock condition, I haven't even got aorudn to replacing the 4Gb Sd card.
I get the same error message alot as well, but it doesn't seem to affect anything