Block scope indicator missing from gutter in Darcula theme

Hi

I'm using IDEA 12.1.4 community edition with the Darcula theme.

According to http://www.jetbrains.com/idea/webhelp/highlighting-braces.html I should see a blue outline in the editor gutter showing the current block scope. This isn't appearing. if I switch back to the default theme then it shows up as expected.

Is this intended? If at all possible I would like to have the block scope indicator appear while using the Darcula theme as I find it very useful. If this is a bug, does anyone know when it will be fixed?

Thanks

Joseph