Found this:
Power off
Hold Vol- and press power Power
Use Vol+&- to navigate to Recovery and Press Power button
Phone reebots to a red triangle
Use Vol+&- to navigate and Power button to select.
First select wipe/factory reset
Then power off and enter the same menu
Select Wipe chache partition
However, seems others have had the same problem and not all resolved it.
One claims installing
https://market.android.com/details?i...=search_result fixed it.