In the two or three column version of K2 and WordPress 2.3.1,  IE6 hangs and won’t let go until you kill it with Ctrl-Alt-Del End Process in Task manager. 

Someone using IE6,  which I no longer run at home,  pointed this out to me.   I know it’s K2 also because choosing another theme removes the problem.  been looking for a fix.  Might try a nightly download of K2. 

(Update: Solution is to NOT use Sidebar Management’s K2’s Sidebar Manager , but instead  use WordPress Widgets Instead. Thanks for showing me the problem with IE6 Julie!)