#1 The keyboard, i got the phone because of the keyboard and i type twice as slow on that as i do on the screen keyboard. I find it very tricky whereas i used to type really fast on BB Bold.
#2 Having to hold the phone right up to your mouth else the person on the other end can't hear you. With my hero i could sit it on my laptop and talk away whilst working but i can't on the milestone. But i know you're not supposed to use a phone like that so hardly fair to call it a problem!
#3 Text on webpages not re-flowing like they do on hero, i miss that a lot.
#4 Extremely loud camera shutter and focus sounds! What the hell is that all about? I've given up trying to get photos of my pets with it because the focus bleep freaks them out and makes them stop what they were doing, very annoying.