80% of the time, if I selected Sketchup Pro 8 "File -> Import...", I immediately got the Bugsplat, and Sketchup would close. If I kept relaunching Sketchup, and selecting Import, eventually the Import Browser would remain open and allow me to import the dwg or dxf file. I figured it might be due to my Autocad 2006 program (which is technically incompatible with Windows 7, even though it does seem to work okay), so I uninstalled Autocad 2006. Now I no longer get the Bugsplat. I installed Autocad 2006 on a different machine than the machine that I run Sketchup on.
Of course, that solution is also a work around, because it would be better to be able to run both applications on the same machine. I have been looking around for a newer Autocad version (Windows 7 compatible) to see if that will help, but it sounds like you all are saying that the Bugsplat will still occur, and that Trimble (and Autodesk?) will need to fix the bug.