I've finally bought an sd card--4gb Sandisk. It seems to work fine, but if I try to do a reset with the card in place, the phone just goes into a soft reset loop. If I remove the card at any time during the loop, the phone resets as normal. I can then reinsert the card and go on about my business. Any ideas what might be causing that? I don't have much on the phone except PI. Pretty much as delivered except for that program.