[XeTeX] Multiple column colors

[Stephan]

Good evening,

I have been pulling my hair on the way to use XeLaTeX with the environment,
and more precisely with colours inside the environment. It seems, that
XeLaTeX gets barfed
when it comes to handling those colors (as opposed to pdflatex who
manages that quite well)

did any of you face this issue and was able to solve it ?

For example, this code (http://pastebin.com/U7B4mjic) works well under
pdfLatex (one column
turns out blue, the other red), while in XeLaTeX, the colors are mixed

Thank you,

-Stephan