"Shaded With Edges" reverting to "Shaded" after changes

HI

Does anyone have any suggestions as to how to stop SW2009 SP1.0switching from a "Shaded with Edges" display to simply "Shaded"following changes to the model.

I've been experiencing this and, whilst it's not the end of theworld, it is pretty annoying. Even after reverting back to the"Edges" view, there are still some edges missing.

GFX drivers (nVidia FX3700) are up to date according to SW website.

Any advice would be appreciated.

thanks

DaveySolidworksAdministration