[HD2 Android Q&A, Help & Troubleshooting and Genera] FreakyFerret:
Note: I'm not blaming MAGLDR. As Cotulla pointed out, MAGLDR doesn't initiliaze the screen. That's left up to the linux kernel. So MAGLDR cannot cause these issues. Since the problem seems to lessen when I turn off GPS, maybe something tied to that? It's something to test.

I've tested a few different builds this evening. Between each build, I did a task 29, reflashed MAGLDR 1.13, and erased the SD card.

Windows Phone 7

good touch input. Precise. No problems other than normal WP7 short comings.

I noticed whenever the GPS was active, the screen would stop becoming responsive and lose accuracy. There would be a "ghost hand" error as well (random bits of screen acted as someone had touched it but no hand was near it). I could lock the screen (turn off) and unlock it to make it responsive again but this only lasted a couple of seconds. Turning off GPS (in settings, location) prevented the problem from occuring anywhere on the phone in almost ALL builds.

Sometimes when the screen became unresponsive, I found hitting the Back button would "wake" it up again. This only worked if the Back button wouldn't actually perform a back action (like on the Home Screen).

The default Browser was totally unusable no matter what. It would randomly scroll or zoom in, never out.

The gallery gave problems whenever there were pictures with GPS coordinates located on the SD card. Could all this be something related to Location services?

Addtionally the default Browser seems to be really jittery too. Even with GPS off, it would randomly scroll up or down.

Builds:

CleanDroid v1.3 - Froyo, Cyan6.1. GL v1 kernel

HyperDroid GBX CW - Gingerbread, Cyan, Tytungr2 kernel (based hastarin 8.6)

HyperDroid GBX CW v2.0 - New version available as I was testing this.

MDJ's CyanogenMod7 v2.6 - Gingerbread, Cyan7, MDJ S10.4 OC kernel

MDJ's CyanogenMod7 v2.6 CW - Gingerbread, Cyan7, MDJ S10.4 OC kernel

MIUI AU v1.28 (Feb 2) - MIUI, no Cyan, kernel not detailed

Nexus HD2 Froyo V1.9G - Froyo, no Cyan, tytung r2 oldcam kernel

Nexus HD2 Froyo v1.9G CW - Froyo, no Cyan, tytung r2 oldcam kernel

Nexus HD2 Gingerbread v2.1 CW - Gingerbread, no Cyan, tytung r2 oldcam kernel

PPC-ShiftPDA 2.3.3 CW - Gingerbread, no Cyan?, MDJS 10.4 kernel

Pure Gingerbread v1.3 - Gingerbread, Cyan (forgot to detail it), gpc#215 kernel

Stock Gingerbread v2 CW - Gingerbread, no Cyan?, MDJ 10.4 kernel

Typhoon v1.7 CW - Gingerbread, Cyan, rafpigna v1.6 kernel OC

Typhoon v1.8 CW - Gingerbread, Cyan, rafpigna v1.7 kernel OC

Plain Andriod NAND flashes.

CleanDroid v1.3 - screen is highly inaccurate

MDJ's CyanogenMod7 v2.6 - screen is a bit flaky, but 80% accurate

Nexus HD2 Froyo V1.9G - screen is accurate about 90%. Sometimes doesn't respond quickly.

Pure Gingerbread v1.3 - Screen is nearly completely accurate.

Clockwork Flashes

I used the 400meg Clockwork recovery to start cause I wanted more space.

HyperDroid GBX CW - Google maps wouldn't even open without Force Closing. Reinstalled. No matter what, screen's touch input was very erratic complete with ghost hand.

HyperDroid GBX CW v2.0 - Even with GPS off, screen problems persisted including ghost hand.

MDJ CyanogenMod7 v2.6 CW - Locked up on second boot.

MIUI AU v1.28 (Feb 2) - Screen was okay mostly though had occassional "ghost hand" errors

Nexus HD2 Froyo v1.9G CW - Worked fine with GPS off

Nexus HD2 Gingerbread v2.1 CW - Locked up on second boot.

PPC-ShiftPDA 2.3.3 CW - Would not boot

Stock Gingerbread v2 CW - Gapps kept crashing

Typhoon v1.7 CW - Would not boot

I then used the default 150 meg Clockwork recovery.

Nexus HD2 Gingerbread v2.1 CW - If I had GPS turned off, the screen behaved except for the Browser.

MDJ CyanogenMod 7 v2.6 CW - Estrong File Explorer gets root, but only items that begin with the letter "D" show up. Minor ghost hand with GPS off.

HyperDroid GBX CW v2.0 - Works well, browser does random zooms still. Unusable. Same with Maps.

Typhoon v1.8 - ADW was twitchy, like my finger wasn't staying still on screen for long press. Ghost hand was present but controllable. It also has some of the CyanogenMod email mods I find really useful.

I'll test more later, but Typhoon v1.8 seems to be working really well (compared to others) for now. I checked with T-Mobile, and they're willing to do a warranty replacement for free. They'll give me a loaner phone and have a refurbished HD2 for me in 5-7 business days. I'm thinking I'll take them up on the offer.