http://bugs.winehq.org/show_bug.cgi?id=9576
--- Comment #4 from Gregor Münch greg87@online.de 2007-09-03 20:00:05 --- Very much thx to you for figuring that out.
The difference between these to kernels are the schedulers. Where ck uses rsdl (I think) the newer one uses cfs.
This could make indeed a difference.