TBH you might have a dud phone. Someone once mentioned that Motorolas quality assurance isn't that fantastic at times and then again, like any peice of technology, some won't be perfect.

The first Atrix I got (first day it came out in Canada) I rooted, did webtop mod on and all that. I was getting maybe 5 hours Battery life, phone would get REALLY hot near the bottom, random reboots would occour 3-4 times a day etc. I called my carriers customer service and they advised it could be a Dead on Arrival phone. I took it back in exchange for a new one and the one I have now is peachy. No issues, great battery life, no reboots.

If you're under warranty of any kind I would recommend taking advantage of it and let them know you might have a defective phone. I don't think the reboots are a normal thing at all and it was one of the many issues with my first phone. If everything else is fine and the reboots still happen then I guess it's up to you. But i'd hate to have my phone keep rebooting on me especially if it comes time to me really needing to use the phone immediatley and it forces me to wait 5 minutes to do so.

/2 cents.

 

did you update the firmware?