Emacs 21.3.1 i386-mingw-5.1.2600

It goes well when I use keyboard only, but when I use mouse, I don't know I clicked at where, when, it often suddenly crash (halt, but not quit). 

Some time (not often) when I use the built-in info system for help, and type some keys (I don't know I typed what keys) it also crashes, it's strange. 


/danz