When we leaked the official ROM and radio image for the HTC Thunderbolt's Gingerbread update last week, users were understandably excited. An official Sense, Gingerbread ROM was probably highest on the list of demands for Thunderbolt users (aside from better battery life, perhaps).
Unfortunately, at this time, we have to officially advise anyone using any ROM based on this leak to revert to a Froyo build or to CyanogenMod 7 as soon as possible. This includes any and all third-party Gingerbread ROMs for the HTC Thunderbolt not based on CM7.
We don't take announcing this lightly, but we do so erring on the side of caution because of the extent to which this problem bricks the phone.