Interesting. Well, I've tested in IE6,7,8, Chrome, Safari and FF on XP and Safari 4, 5, 6, FF on Mac. The only one that has any issue is IE6 which pops up a query about being redirected to a non-secure URL.
If it were just adjusting the module then that would be fine but unfortunately the adjustment requires hacking/editing com_comprofiler/comprofiler.php to handle the login redirect properly.