[outbackvandy]

I'm not sure we have the same cause, but here is what caused my HTC Touch Pro2 to show Error Code67.

I was playing around with XDAndroid AOSP 2.1 on my device, then used Menu+Hngup key to power off. HTC blank screen immediately came up and device booted back into WinMo 6.5 (MightyRom). Error 67 popped up right afterwords. Trying to go to setting->system->update profile / update prl, neither option works.

After trying a couple of more options and nothing worked, I powered off the phone, waited for one minute, turned it on again, the error is gone.

Again, not sure it helps your situation, but it fixed mine... Hope it will work for you as well.