Photoshop, multi-monitor setup has wobbly lines at left of monitors

Question

Hi All
I'm having a problem with jagged, wobbly lines in Photoshop CS5.1.  This has nothing to do with Smoothing or anything (the wobble is more pronounched with smoothing off however).
I believe it has something to do with my 3 monitor setup in Windows 7 64bit, Nvidia GTX 460, and some sort of positioning error PS can't get it's head around (this affects NO other programs I have like Painter or Artrage).   See below for my setup.  I have the Cintiq 24HD and Intuos 4 and the problem occurs on both tablets.  Any monitor that is set in Windows Display at '0' will have a wobbly line in Photoshop if I draw if the doc is at the left of the monitor and I then draw in that area.
If I place a doc from Photoshop in the centre of the Cintiq - no wobbles.  As soon as I move it near the top left of the Cintiq (when it's monitor position in Windows is aligned directly under Monitor 1 as they are the same size), the wobble starts.  Once it's started on a doc, it continues no matter where you try drawing on the screen after that until I close and reopen Photoshop.
This definitely has NOTHING to do with electromechanical interference to the tablets as I never physically move anything but can change it's occurance by moving the Display layout in Windows.
Any monitor For me it starts from the '0' position up to about the '474' position. If I aligned all my monitors one underneath the other so they were all started at '0', then they'd all do the wobble thing on the lefthand side (using either the Inutos4 or Cintiq).  Windows makes you have your main monitor at '0', so I alway have a problem on that monitor.  The other person I know of who has this problem (posted on the Wacom forum), has said they get around it on their Cintiq (which is the main monitor), by pushing on of their other monitors into a negative setting to the left.
It's a real pain.  Anytime I want to use my Cintiq in Photoshop I have to go into Display setting and move it to the right.  Once you get the wobbles they don't stop.  ie they are then not restricted to the left of the doc, but all over.  You have to close and reopen PS and start again.
Below is an example of the wobble.  First I drew on the right... no wobble.  Then I drew on the left.  Lines are no longer smooth, but jiggly.  Note smoothing is ON.  Wiggling is worse with it off.
I haven't a clue if it's an Adobe problem or a Wacom one.  Note that my graphic drivers etc are all up-to-date and I've uninstalled, reinstalled, cleaned reg, unplugged/replugged, tried just one tablet or other , stood on my head, for Wacom drivers (old versions and newest versions) till I'm blue in the face.  No difference.
Anybody have an idea?  PS Wacom (europe at least) do seem to know of the problem, but are not saying anything else at the moment.

Answer 1

No, it's got nothing to do with electromagnetic interference, or I couldn't change what happened by just altering the monitor position within Windows multimonitor display setup and not moving the tablets physically at all.  And as you say, interference would happen on every program - not just Photoshop.  There is no actual 'cursor' wobble. I've had interferance on older Intuos 3 tablets and at the edges of the old Cintiq 21UX, so know what that is like. 
I think it's either the Windows OS or Wacom Driver, not telling PS something about the Monitor position Or PS not reading the info correctly.