Avast home page load prob. and IE 7

I have just reinstalled avast 4.7 pro and also upgraded to Internet Explorer 7 beta and I see that the Avast web page is not loading correctly "blank boxes "
How can I fix this…so far its the only web page I’ve seen this problem with…

Are you using any firewall or content filter (browser extensions)?
I suppose you have XP SP2 fully updated…