I've seen posts about this problem pre-official release, but never a solution other than going back to radio 1.x and Android 2.1.
So here's the sequence of events:
1. Existing 2.1, rooted, stock ROM.
2. Get "official" release v3.21.605.1 (from [ROM] Incredible Sense/Froyo v3.21.605.1 *Official Release* (100% stock, rooted) - xda-developers
3. Upgrade, internal speaker not working
4. Attempt to revert to 2.1 and 1.x radio - no go. 2.1 loads, but can't get 1.x radio.
I do have S-OFF from unrevoked forever.
Has anybody run into this? Everything else works fine, but I am stuck on radio 2.x (see my sig). No method that I can find on the 'net has been successful in allowing a PB31IMG.zip with the old radio to downgrade the radio.
Thanks in advance
Oh, important note!!!
Previously, when I was successful at downgrading, I had clockworkmod 188.8.131.52. I had 184.108.40.206 when I did the above. I did try returning to .1, but same result.