ps. I think we should drop IE<9 support after 1.0 release.
I beg to differ, as IE8 is still in use.
Indeed, loosing support for IE8 would basically make roundcube a non-option here. Random googling shows that it accounts for 20+% of world wide market share right now and that represents many thousands of users to us. (We're having enough trouble with users on IE 5/6/7.)