Hi,
My support number is 12254202812. Raised on the 4th December. I was recently told there is unlikely to be a quick solution to the problem. I have recently created a Windows 7 image from scratch in the hope the problem would be eliminated, no such luck. It has got better and more manageable, but the problem is clearly there still as can be seen by monitoring the hosts with ESXTOP and drilling down to the SVGA worlds.
Thanks.