I have an big probleme with my HTC diamond !
if i flash my BASE rom firmware my HTC reboot with the same message :
Microp Version Mismatch 0
Please update latest Microp firmware
* my version is MicroP-Diam (LED) v11*
if you have rom version for update it thanks or over solution !
I have allways make : Hard reboot and soft reboot , changing firmware ect ......