Here's most likely a question for cvp, who likes to diagnose all my problems, but anyone else is most welcome to take a gander.
I'm trying to create selection highlighting, but the highlight sprite isn't showing up.
Relevant images showing where the highlight sprite is used in code:
<img src="http://i.imgur.com/yQ4coTY.png" border="0">
<img src="http://i.imgur.com/MG97cHf.png" border="0">
And the current result that does not show the highlight :(
<img src="http://i.imgur.com/soaINj1.png" border="0">