As you probably already knows IE 8 Beta 1 is available for download from Microsoft.
Guest what, this new version comes with new compatibility issues. Don't panic, it won't be as bad as with IE 7. Microsoft build a «IE7 compatibility mode» in IE8. You can trigger it by hitting a button on the tool bar or web page developers can add the following tag to their web pages :
<meta http-equiv="X-UA-Compatible" content="IE=7" />
More infos :
- Compatiblity and IE on IEBlog
- Beyond DOCTYPE: Web Standards, Forward Compatibility, and IE8 on aListApart