git instaweb + webrick does not work

I'm trying to use `git instaweb` with Ruby's webrick (which I have installed) on Mac OS X, but every time I fire up it up via `git instaweb --httpd=webrick`, I get the following error:

"webrick not found. Install webrick or use --httpd to specify another httpd daemon."

I _do_ have webrick. Asking around a bit, I was told the the problem may have been introduced in commit be5347b. Is this so? If not, any other ideas on what may be causing the problem?

I'm using Git v1.7.2.1 on Mac OS X 10.6.

Thanks,

---- Michael Dippery mdippery@gmail.com | www.monkey-robot.com