When I pan to move the model about all of my points disappear then reappear when the model has stopped moving. Its like a steering wheel in my pants..Its driving me nuts! Any ideas?

New rig : Rev18, SP 6, HF 6, HP XW 8600, 8gig, Invidia Quadro FX 5600, XP 64.

I thought it was Tools -> Options -> Display -> Performance -> Pixel Culling -> While Moving, also.

If I change the value While Moving to, say, 25 the points disappear while moving the part. If I make the value 3 everything is OK.

I'm using 64bit and nVidia Quadro FX 4500

Hope this helps.  Occlusion culling Enabled.  I would question whether you have the latest driver for your video card. 

As per the documentation:

"This option is similar to the Level of detail options, but in that case, it lets you define the size in pixels of objects to be hidden or displayed in your geometry using the Static and While Moving sliders.

• Static: even if you do not want to move geometry, it is often useful to remove details you do not need to see. To do so, set a high value to remove these details. On the contrary, setting a low value displays the details. For instance, setting 2 means that objects whose size on screen is lower than 2 pixels are static
• While Moving: setting a high value enables you to move large parts more quickly. When you release the mouse after moving the part, the Static size is redisplayed."

So it seems to be the option to change. Of course it will impact the performance with big models.