There was a windows/opengl state problem (seems to be only with Windows 7) that caused the right-click to crash in the 3d view (but not the 2d view), this had to do with using vertex buffers during selection render, bla bla bla..
The fix was posted today for those that need it (the codebase zip dated 1-27 includes a compiled release exe), I haven't seen any documented reason why vertex buffers can't be used while rendering in select mode, but there it is..
Let me know if you have any questions, the right-click is now a bit slower (using immediate mode to render all those tris) but stable..this could be optimized a few ways (using imposters), but I'm leaving it as-is for now..