Two Quick and dirty solutions:
#1(vista) download d3d8.dll,d3d9.dll for Stability, helps sketchup graphs speed.
http://www.dlldump.com/download-dll-files_new.php/dllfiles/D/d3d8.dll/5.03.2600.2180/download.html
#2
Run more than one sketchup:
http://forums.sketchucation.com/viewtopic.php?f=79&t=40254
a) By copying sketckup 8 to another location, you can load more plugins.
b) Also a empty plug-in folder is a great viewer
c) For zone testing for new downloaded plug-ins
Now Enjoy, Give thanks to sketckup team.