just unpublish and publish mambots and modules. core joomla module i would assume are ok because i have them in my dev site but any module or mambots you added yourself (third party) should be considered a suspect.
I'm a newbie and really don't have enough knowledge to answer posts, but this is what I had to do to my site. Disable my wysiwyg editor in the global configurations, embed the you tube code, but also change the size of the video because FF showed it fine, but IE7 pushed the content down on my page. So, instead of 425 x 350, I have it set at 300 x 225 and it seems to work fine.
Also, if you ever edit your content, change what you wrote, etc. make sure you disable your wysiwyg editor again before editing it or it will jumble up the code.
i checked the logs on my browser when i opened that page and i saw some errors on jomcomment. is it possible for you to remove that, just for that page temporarily. i can't try it because i don't have jomcomment and i think that is a paid component.
I have the same problem with Bonus - Darkmatter. Everything is ok whith FF, Flock, Mozilla, ecc. ecc. It doesn't work with MSIE.
I deactivated the RockLatest module and something happens: it doesn't work, but if you press ctrl+F5 it works. Next time it does not... you press ctrl+F5 again and it works.