Heap profiling in GHC broken?

Hi. When I tried to profile my program in search for space leaks, it core dumped on me (actually on Win2000/Cygwin). I'm using ghc 6.0.1. Does anybody know what could be the problem? (To be more precise: any +RTS -h_ options make problems, +RTS -p works fine. I get a message meaning the equivalent of "statement in '0x0058db43' points to memory in '0xfffffffc'. Could not read.") Cheers, Markus -- Markus Schnell