[alpha] Missing glyphs in text editor

Hi Xamarin,

I downloaded the alpha version of Xamarin Studio for iOS 7 development but that version makes certain glyphs (those to be precise: '[', ']', '(', ')', ';', '"') to be pretty close to invisible in the text editor, rendering Xamarin Studio unusable. Is there a know workaround/fix to this bug, or should I file it somewhere ?

Screenshot: http://cloud.hart-dev.com/image/3c07312p1s0B

By the way, changing font or syntax highlighting does not improve anything.

Thanks,