i believe that this version uses lots of directx inside xp
the current version of virtual box is trying to do heavier emulation of 3d capabilities inside the virtual machine to allow more games or 3d hungry apps to run inside the virtual machine so the new version and new drivers can create this situation, a regression where certain apps ends broken
in another link someone suggested to use a older autocad version(acad2000) inside vmware to avid this but honestly both versions are in the same situation, trying to access directx properly
friggin directx!