Having a similar problem when upgraded from v10 to v11. Any walls that have a Cut Fill Background Pen color except Transparent or Window Background will turn black when I go to different views. Zooming in & out, no problems. I have to resave each time for the wall fills to show normal again. This problem happens often but not each time using v11. If I use v10, no problems. Thought it was the video so upgraded from ATI Radeon 1600 to GL5200, same problem occurs. I have the latest ATI driver installed and completed the other posts regarding video problems.
Any ideas?
v11 1114, Windows Xp Pro SP 2 (5.1, build 2600), DirectX 9.0c, Intel DG33TL, Core 2 Duo CPU E6550 @ 2.33 GHz, 1.98 GB Ram, ATI FireGL 5200.