6.4.3 and threaded RTS problems

[Wolfgang Thaller]

> Could someone on MacOS X try the 6.4.x branch again?  I just  
> committed a fix that makes the threaded RTS more stable on Solaris,  
> and I'm hoping it clears up the problems on MacOS X too.  Remember  
> to re-enable -threaded in ghc/compiler/Makefile if you previously  
> disabled it.

The problem seems to be solved now, great work!

Cheers,

Wolfgang