Thanks for the quick response...
I thought it would be something about receiving a call during updating, but since the phone (as well as the HD2) would go into a different mode when updating I didn't think there was any risk. The phone is disabled during updating right?
I can imagine something about the sd card, but again... Perhaps something from the early days. I now can't imagine how the sd card would mess with the updating (maybe if there is some update file on the sd card as well, etc).
Ah well, perhaps I'll remove them anyway to be sure