valgrind error

Just for fun, I decided to run valgrind on the "empty program", i.e. main
= return (), compiled with ghc 6.0.1.  Much to my surprise, it found an
error:

==21117== Source and destination overlap in strcpy(0xbffffc02, 0xbffffc04)
==21117==    at 0x40021E99: strcpy (mac_replace_strmem.c:87)
==21117==    by 0x8063D45: setupRtsFlags (in
/home/abe/src/haskell/test/empty)
==21117==    by 0x402B3DBD: __libc_start_main (in /lib/libc-2.3.2.so)
==21117==    by 0x8049320: (within /home/abe/src/haskell/test/empty)

I'm not sure whether this is even a bug or just an artifact of weird
memory handing in the RTS, but it's worrying either way.

Abe