aparently from thermal shock as i was cleaning the screen with windex after it had sat in the sun all day friday.
there was a thread on here a while back that said where you can get replacement parts. i saved the service manual from here on anoter old thread and used it to open the unit. but i cant find eather thread.
so where can i get the touchscreen glass thing by it's self? if it's not too expensive i might just save up for another - more stable unit and sell the D3.