I'm setting the priority to "release blocker" because the current 
behaviour is completely unwanted, the "mac-roman" encoding is no longer 
used by default on OSX. All system tools write UTF-8 encoded files by 
default, and the LANG variable is set to an UTF8 encoding as well.

I won't be able to look into before sunday, and possibly only after next 
week (that is june 15th or later) because I'll be at a conference and 
don't know if I have spare time to spent on this after sunday.