Hello All :
I am experiencing the same or similar issues as the OP. It's like working in year 1995 CAD!
Having upgraded from VW 12 I have turned off all of the bells and whistles with the screen hints, highlighting, animation, etc. Basically the drawing window drops out (either goes white or goes gray with the drawing missing completely) and kind of flashes as I go to grab a new tool or after it completes some commands. There is a half-second or so lag before the drawing reappears. It very much reminds me of early CAD system's slow screen regeneration, but this happens several times within the course of a minute - it just seems like it can't keep up! It makes work very difficult and I'm left with no other option as I am running Leopard.
I am running VW 2009 SP2 (Build 99197) on a MacPro 2x 2.66 GHz Dual-Core Intel Xeon with 10GB of 667 MHz DDR2 FB-DIMM RAM on OS 10.5.6 and using a 30" Cinema Display with the NVIDIA GeForce 7300 GT card at 2560x1600 32-bit color resolution. I checked the link above for an update on this card driver and my system tells me that it is not necessary for this computer, and I have updated all other software as far as I can tell.
Also I have read the System Requirements that VW publishes on their site. The info there is not very specific, but it seems to indicate the combination of a 30" display and (which?) graphic card can cause users to be "dissatisfied" with the performance. But it also says that this combo would need to include older generation processors and video cards which I don't think mine are, but VW needs to clarify what "older generation" is.
So I am at a loss. Is there anyone out there with a work-around or info on upgrading to a video card that will work with this configuration? Or even better - VECTORWORKS TELL US HOW TO RESOLVE!! We need help to figure what to do with our systems...
Thanks for your time.
