Originally posted by Wanmac
Intergrated Intel Graphic chipset. On a laptop using Vista correct. As for the transparencies i'm not sure. The screen shot shows the plane in perspective view with no attributes changed from default.
If you are in the the default view, then you shouldn't have a bit of the plane clipped. Could be part of the same problem as the compass. Does moving the camera around resolve the problem - eg. it flickers on and off?
My dodgy Radeon 9550SE does a similair thing sometimes when I'm modelling - part of the grid or mesh disappears as it has poor hardware support for clipping and transparencies. An integrated Intel chipset is going to be much worse than my mostly bearable Radeon, so I would suggest, if you have access to another computer with a dedicated graphics card (doesn't matter if its an old-ish two year one), to install Maya on it and see it disappears.
You can also try to update the drivers, but I don't know whether integrated graphics gets monthly driver updates, so that may not be an option.
C. P. U. Its not a big processor... Its a series of pipes!