[plt-scheme] Lost my command-I in OSX 10.5 Leopard

I'm using PLT Scheme 372, and upgraded my Mac OSX to 10.5 Leopard a
few days ago.

I've just noticed the command-i key now just inserts an "i" character,
where I was expecting reindent-all.

Menu item Scheme -> Reindent All still works, and is marked with the
hot-key command-I as always.

What am I missing?

-- 
Phil Rand
philrand at pobox.com