IE8 is still in a premature version. For all the developers that need to re-insure that web pages will be displayed and work as before there is one quick tip. A single line of code to add to your pages.
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
This meta tag will make IE8 work as IE7 did.
Maybe there are still very few ppl that browse with IE8 (browser statistics) but i thought you should know this tip.