My 30D wouldn't power up...removed and put back in place both batteries...only to have the blue button light up and remain on (with power button off or on) until the main battery is removed...

I had to send it back to Canon...anyone else have this problem?
Thanks for your replies.

Well, I got my cam back from Canon and thought I'd post the results...
Canon replaced in warranty, (6 mos. on this repair, 4 mos. remain on the orig. warranty), the DC/DC printed circuit board, and as a coutesy cleaned the Cmos and updated the firmware (o.s.) to 1.0.6.