i use blaxxun contact 4.0 + bs contact 6.1 + windows xp + IE 6 + virtualbox and its rarely crashes.
also bs contact 6.1 + windows xp + IE6 + virtualbox and its also rarely crashes.
also blaxxun contact 5.1 or 5.3 + windows xp + IE 6 + virtual box and its also rarely crashes. (bs contact is optional in this case)
=)