Liza, I asked someone from Motion about this and this is his response -

"The tablet will run hotter inside a bump case than without a bump case.
There are failsafe mechanisms which will cause the Tablet to shutdown before
it gets hot enough to damage itself. This may be why your tablet shutdown,
or there may have been some other reason. If you are having a persistent
problem please contact Motion Support as shown below and they will help
troubleshoot the problem.
Please contact Motion Support by filling out this email form or, if you live
in the US or Canada, by calling 866-322-9783.
Technical Support Hours:
6:00am - 12:00am Monday-Saturday
(Central Standard Time)"

I hope that helps
--
Terri Stratton
Editor / Owner
http://thetabletpc.net
http://themediacenterpc.net
Microsoft Featured Communities
Microsoft Windows MVP - Tablet PC


"
"Doctrek" <doctrek kummermd@sbcglobal.net> wrote in message
news:nQGAe.501$c41.451@newssvr30.news.prodigy.com. ..
>I bought my first tablet! I also bought a bump case...the first time I
>used it with the case, the pc just rebooted itself...I noticed that the
>back of the tablet was really hot..could this be the reason? ...seems
>unhealthy to keep all that heat in. Thanks
> Liza
>
>