I have the same problem, had it since launch. I've tried:
Enabling Triple Buffer with Radeon Pro - No effect
Disable vsync in Radeon Pro - No effect
Disable vsync in CCC - No effect
MSI Afterburner fps limiter - No effect
DXTory fps limiter - No effect
Simple Borderless Window - No effect
Disable vsync in SkyrimPrefs.ini - Worked with 1.4 patch and earlier. With patch 1.5 and later vsync is always on.
Antilag fps limiter - Helps mitigate the problem if I limit my fps to about 31 but the mouse jitter is still there.
ENB fps limiter - No effect
Uninstall Logitech Setpoint - No effect
I'd really like to see Bethesda address this issue or at least have the community come together and figure out a real fix once and for all.
My specs for those that are curious.
Intel i5 2500
8Gb Ram
Ati Radeon HD4870 (latest drivers)
Windows 7 Pro
Logitech MX Revolution mouse
I'd like to enjoy this awesome game without feeling like I've got a vibrator strapped to my mouse.
