Jeredquinn: Yes yes, I searched!
Niziol: Yes, but if you try several different themes in several different browsers you will notice that it doesn't allways work. Like this theme (in MSIE):
Notice how the "Blog" item in the "page menu" stays white no matter what. Also when active. And I've seen maybe 10 other sites today with various themes where it didn't work either (they could be running earlier versions, of cause).
Anyhows, that's why this cool dude wrote his plugin. To fix this rather important usability issue.
Now, I've added some code manually that fixes the problem. However, I'm not confident with that solution. That's why I would like to play it extra safe by also installing the plugin.
I'm a complete php/css ignorant, mind you :-)