I was just wrapping up a new website, when to my <sarcasm>big suprise</sarcasm> I found that it was broken in Internet Explorer 8. After doing various tricks to optimize and troubleshoot the code, I discovered that one feature in particular was working just fine in IE7, but was throwing javascript errors in IE8.
I'm utilizing the JQuery plugin MapHighlight to generate a fancy border/highlight effect on an interactive floorplan feature. It turns out, that in IE8, Microsoft removed support for a wildcard selector when creating VML objects. Luckily, this was a relatively easy fix, as someone already did the tough work for us.
Here's how to apply the fix yourself: