NIS 2011 Crash IE9

I have a problem with IE9 and NIS 2011 on certain webpages.

Ex www.tweakguides.com crash my IE9 if i don't run it in compatible mode, it happens when i load the wepage then press back and load the webpage again. The crash report informs me that mshtml.dll is the reson for the crash.

But if i disable Symantec NCO BHO the webpage loads without no problems with or without compatible mode.

This happens on a few webpages and is often fixed with compatible mode but some keeps crashing like www.vardguiden.se/ if i brows the webpage long enough.

The problem i always fixed if i disable Symantec NCO BHO or use firefox 4.01.

 

I removed and reinstalled IE9 and i even tried to remove IE8 (with is working prefectly) before installing IE9 but to no avil.

Also tried software rending mode but it's the same.

Mshtml.dll is always in the crash report.

 

Any suggestions?