[ESS] font colors out of sync in *R* buffer

[Armin Goralczyk]

This also happens in the german localization where warning messages
including umlaut are printed as "a for ä. An example warning message
from my current session:

Fehler in ci[i, , 3] <- metarate(e = rds$e[i, ], n = rds$n[i, ],
method = "double") :
  falsche Anzahl von subscripts
Zus"atzlich: Warning messages:
1: In return(ci, theta) : mehrargumentige R"uckgaben sind veraltet
2: In return(ci, theta) : mehrargumentige R"uckgaben sind veraltet

When " is unmatched the buffer will remain in pink. How can I prevent
this? How can I change to english messages (presumably without
umlaut)?

Thanks
-- 
Armin Goralczyk, M.D.
--
Universitätsmedizin Göttingen
Abteilung Allgemein- und Viszeralchirurgie
Rudolf-Koch-Str. 40
37099 Göttingen
--
Dept. of General and Visceral Surgery
University Medical Center Göttingen
Göttingen, Germany
--
http://www.gwdg.de/~agoralc