Eratic mouse behaviour makes system unusable

After updating to Lion 10.7.4 my system is now unusable. If my 27inch Cinema Display is connected then the mouse pointer jumps off in different directions to the edges of the screen. Move it very slowly (no more than 1 inch per second) and it just about stays stable. Random shooting off to the screen edge even when not touching the mouse.
Unplug the Cinema Display and the random moves stop, but...
Drag and drop works only occasionally
Single clicking randomly gives double clicking results.
All this has only ahppened since the 10.7.4 update. No additional software was installed at that time or since. Tried various wireless and usb mice from Apple, Logitech and a local manufacturer all with no effect. Faults are all able to be replicated instantly.
I now have a system which is unfit for the purpose for which is was sold due to the update.
Seen dozens of posts with the same problem and no action from Apple. Any help would be much appreciated.

Thanks for the reply.
Yes, it looks like something is acting a bit strangely.
All I want to do is to press and hold the mouse button on the title bar to drag the window, just as I would on any other OS.
I'm not looking to double-click (which OS X can be set to do minimize, but I've disabled), not a sticky click and release (like accessibility features might allow), not press a keyboard modifier key as well, and not to press, hold, and wait a while.
You're right that the next logical step is to connect a mouse directly, and that's what I'll do.
I'm going to try connecting the mouse directly, but that really goes against the KVM concept of using a single keyboard/monitor/mouse to control multiple computers. My KVM sends as a USB 1.1 standard mouse, down the same cable as the keyboard, and it works fine with other systems. (I've even got a magic mouse, but that's no good, as it hasn't got a middle button, which I need for my UNIX & Linux VMs.)

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Thanks for the reply.
Yes, it looks like something is acting a bit strangely.
All I want to do is to press and hold the mouse button on the title bar to drag the window, just as I would on any other OS.
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I'm going to try connecting the mouse directly, but that really goes against the KVM concept of using a single keyboard/monitor/mouse to control multiple computers. My KVM sends as a USB 1.1 standard mouse, down the same cable as the keyboard, and it works fine with other systems. (I've even got a magic mouse, but that's no good, as it hasn't got a middle button, which I need for my UNIX & Linux VMs.)

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[Image of failed backup|http://www.sawyourad.com/toshiba/failed.png]
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[image of disk partitions|http://www.sawyourad.com/toshiba/diskmgmt.png]
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[Backup fails Error code 0x81000019|http://social.technet.microsoft.com/Forums/windows/en-US/25deba76-464b-4a9d-9b32-a283bb6a88ce/windows-7-rc-backup-fails-errorcode-0x81000019?forum=w7itproperf]
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Message Edited by Jaegen on 09-28-2006 10:10 AM
Attachments:
SelectionBoxBug.png ‏14 KB
SelectionBoxBugAfter.png ‏14 KB

Day wrote:
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Message Edited by Jaegen on 09-28-2006 10:31 AM

Eratic mouse behaviour makes system unusable

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