I have a pure CSS mouseover slider fully functional here http://jsfiddle.net/gU4sw/13/ .
When I add this code to my wordpress page, it doesn’t work… 🙁
Can someone please check to see if there a quick fix or explanation for this?
P.S: By the way, I was able to install the same exact slider code on another wordpress installation without any problems, yet it doesn’t work for this installation for some reason 🙁
Your css rules are missing your wordpress css thats the main issue you are facing. In fiddle the css is working on hover but in wordpress css its not present try to check you css again.
Update:
In you css rule is not closed at line 499. right curly brace
}is missing thats why below this rule all css is ignoring.try to close this and see whether css will work or not. I have tested in FF firebug your desired css is not including.