Your ConcBubbleFilled and ConcBubbleMouseover image styles are still using the default blue and yellow "bubbles"
Code:
<ImageStyle Filter="true" Name="ConcBubbleFilled">
<ImageFrame Name="image" Source="/images/window_elements_generic.dds" SourceRect="270,160,287,164" />
</ImageStyle>
- <ImageStyle Filter="true" Name="ConcBubbleMouseover">
<ImageFrame Name="image" Source="/images/window_elements_generic.dds" SourceRect="292,160,309,164" />
</ImageStyle>
I believe you need to make a yellow star-style for the mouseover effectors. Also, you could be having problems because you go in a radial style as opposed to a vertical or horizontal style.
I hope that helps a bit. I don't know what else could effect them. >_<