GPS problems after MR1/2 update

[thzone]

Here's the problem.

I was going to return my XV6800 (Verizon) and get a Touch Pro. I was informed that I'd have to wait a few weeks before they would send me a brand new Touch Pro. But I didn't know this before I had updated to MR2.

I undid the Verizon lockdown on the GPS (Qpst, etc...) and can get google maps to recognize/use the GPS (valhalla GPS cab... etc...) So long as I'm using Verizon's MR1.

Now, when I flash using a custom ROM, nothing can find GPS satellites. Not Google maps, not LIVE search, not the HTC GPS tool. Flash back to MR1, and apply the valhalla cab, and they can all use the GPS chip just fine.

Google maps sits at "Seeking GPS satellites (0)... forever, and eventually says that I should go outside.

Anyone have any ideas? (Cross-posted to xda-developers)