Win7 + Nvidia + Toshiba Dynadock - Flickering display

[CSparrow]

Hi

Have an Acer Travelmate 8481G Ultrabook with Windows 7 Pro.
Has a built in Nvidia GT 520M.
Have a Toshiba Dynadock V (PA3778A-1PRP) (DisplayLink device)
Am intermitantley getting flickering on the screen.
Only lasts for a second or two.
Happens about 8 times per day.
Is happening on several systems all same as above.

Have just installed the DisplayLink 7.1 M1 driver
Same problem.

On one unit am running the latest Nvidia driver 310.90 suit GT 520M Notebook.
Others have the original Acer/Nvidia driver. (28/1/12 - 8.17.12.9555)

Did notice in device manager the DisplayLink driver details 4/9/12 - 7.0.41409.0
Is this correct for 7.1M1?

We know it is the fault of the Dynadock / DisplayLink as we have resetup one unit without a Dynadock and worked fine for several weeks.

When will this fault be corrected?