Group: current SVN version
I work under win98se.
1. Start blender,
2. Add armature with 2 lines,
3. go out from edit mode,
4. press CTRL-TAB,
5. select the second armature line,
6. press G, and move your mouse, (do nothing)
7. press TAB (enter edit mode),
8. select the second armature line with B,
9. press again G. And now there is a crash.