mxcl/homebrew — comment on commit dcfd4ed79ab4f1b60537133587044867652a3781
File:  line 0
By hgimenez:

OK, made some more research.

You are right. What's happening is that now, as of 9.1, all contrib packages are being dumped in `extension`, because of the new extension mechanism available (see pgxn.org). They are still contrib packages, but are installed via the extension framework. Not finding the contrib directory combined with the hurried read of the postgres manual drew me to that conclusion.

Sorry for the noise here, and thanks for taking a look!