You can see i have opened 5 tabs and still 70 mb,
<a href="http://img249.imageshack.us/my.php?image=scrbk5.jpg" target="_blank"><img src="http://img249.imageshack.us/img249/3931/scrbk5.th.jpg" border="0" /></a> IE also sometimes take more memory than this, although it was a common problem for FF, but still its good.