Johannes Waldmann wrote: > are there known problems with ghc-6.4.* and gcc-4.*? > It seems that -O2 does not work (on i386), > as gcc says something like "Prologue junk". > (Suse linux 10.0 comes with gcc-4.?`as default compiler). There may well be problems, yes. Have you tried 6.4.1? Or a STABLE snapshot? Cheers, Simon