It appears that the 3D accelerator issues I was have remain present with version 4.0.6.
Graphics problems I was having with the pre-processor Salome-Meca for the finite element program, Code Aster, I'm using I've found that the problem lies with the 3D accelerator in Guest Additions. The main window where one would work on a model disconnects from the program and the program freezes up. The error or warning message that shows up in the terminal window is: OpenGL Warning: No pincher, please call crStateSetCurrentPointers() in your SPU. There have been other posts where folks working with graphics programs such as AutoCad have experienced similar problems. The only solution at this point appears to be to deselect the 3D accelerator box in Display in the VBox Manager.
Hope we can get a fix on this one. Otherwise everything works great.