Buggish partly highlighted parentheses or something

[lydell]

I'm using the default Sublime Text 2 theme (Monokai), and I see some strangely highlighted stuff.

Notice how about half of the parenthesis are highlighted here (and that lone dash):

Or here (including the slash):

Or here, but just the slash:

Often, the word "comma" is highlighted (but not in the first image):

What's going on here?

All the images are taken from this SCSS file.

[stephenway]

Looks like an issue with the regex match in @for rules.