On 27/06/2012, at 17.41, John Gleeson wrote:

Is it possible to get a PPC build of version 1.5.11, or are PPC users stuck at version 1.5.10?

They are stuck at version 1.5.10 — the only change for 1.5.11 was signing for Mountain Lion (Gatekeeper) and adding some Info.plist keys mandatory for Snow Leopard, so PPC users shouldn’t care about this (as they can’t run these OS’es).