During the beta if IE8 I noticed that our sites menu was rendering white dropdowns.  For instance when you would hover over a menu item it would drop down a white box.  Now that IE8 is out I thought I should revisit this.  Unfortunately, I discovered this was still an issue at a new client site as I was going to demonstrate one of our server reports.  Tonight I decided to take a look into this.  After a quick Google search I cam across Giorgio Sardo's MSDN blog.  Bingo, this was the exact issue.  Thanks Giorgio for the post! Below is a link to his post:

ASP.NET Menu and IE8 rendering white issue

The asp:menu control is a great tool.  It's easy to update your menu via an XML file.  I am glad that this has been addressed by a hotfix from Microsoft.  Although I think this should have been fixed prior to IE8 going live.