.ghci file is ignored on Mac OS X

I'm running ghc 6.10.4 on Mac OS X, and no matter what I do, my .ghci file is completely ignored. Even if I put .ghci in the same directory I'm invoking ghci from, all the commands are ignored. Other than that, as far as I can tell, ghci works fine. My .ghci file contains only these lines:

:set -fglasgow-exts -W

:set -v0

I can invoke these options successfully by calling ghci with the options enabled, but I'd rather use a .ghci file.