I initially thought it was only that valentine's day doodle that was crashing IE9, and that since we can't load that page any more, MS wouldn't care to fix it. Thinking about it again, I think it's a problem with IE9 since I did see the same jscript crash happening long time ago, and people suggested resetting java plugins, uninstalling flash plugins, running regsvr32 jscript9.dll, nothing worked.
I also read that MS Technet, I use Kaspersky 2012 and had the same problem on two computers. On my wife's laptop, she also has Kaspersky 2012, but hers was working fine. She didn't have all the Windows Updates at the time though. So I don't know if it can be related to KAV2012 or not.