External screen rotation broken?

Hi all,
I've got a unibody macbook (first generation) with the Nvidia Geforce 9400M GPU. When I installed Snow Leopard in the place of Leopard, screen rotation stopped working for me. I have a mini-displayport to dual-link dvi adapter connected to matrox triplehead2go digital edition with two 24" flat panels connected for a screen resolution of 3840x1080.
In Leopard, I set the screen rotation to 90 degrees, and I rotate my two screens and everything is great. In Snow Leopard, no matter what I set the screen rotation to, it never actually rotates the display. According to System Profile, screen rotation is supported:
NVIDIA GeForce 9400M:
Chipset Model: NVIDIA GeForce 9400M
Type: GPU
Bus: PCI
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0863
Revision ID: 0x00b1
ROM Revision: 3343
Displays:
Color LCD:
Resolution: 1280 x 800
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Display:
Resolution: 3840 x 1080 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Mirror: Off
Online: Yes
Rotation: Supported
Adapter Type: Mini DisplayPort To Dual-Link DVI Adapter
Adapter Firmware Version: 1.01
When the screen is set to be rotated, instead of saying Rotation: Supported, it says Rotation: 90, or 270, or whatever it's currently set to.

Lack of official support (from Matrox) doesn't have anything to do with the problem.
I have USB keys, and external hard drives, that aren't officially supported by the manufacturer on OSX, and the drives work just fine because there is no bug in the OSX drivers. Like DVI, USB mass storage works using standards.
If in Snow Leopard, external drives stopped working when the drive size was exactly 3.5798 GB, it wouldn't matter whether or not the manufacturer of the drive supported OSX, there would still be a problem with the driver.
The TripleHead2Go is just a monitor, and DVI doesn't support rotation, it's something that's built into the Apple/Nvidia drivers.
In any case, to prove the point, when I use the TripleHead2Go and set the display size to 1920x1080, rotation works just fine. When I use the TripleHead2Go and set the display size to 3840x1080, rotation doesn't work at all.
The driver no longer handles rotation at 3840x1080, which it used to in Leopard. If I had $55,000 just to prove a point, I'd buy the Barco LX5 Projector, which supports 3840x1080 natively.
In any case, the point I'm trying to make is that the device works fine in Snow Leopard, OSX just sees it as an attached monitor. The problem is with the driver not handling 3840x1080 as a display resolution when rotated to portrait. It works just fine in landscape.

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