I'm away from my computer for the next few hours or I'd do this myself: with the Gemstone -> GemTalk Systems rename, we need to change the URL in Installer class >> #squeakSource3 (or whatever #ss3 uses) to point to the new URL.
This will allow correctly written Installer scripts (i.e., ones that use #ss3 and not #url:) to carry on working.
Dale Henrichs has found that Squeak MC HTTP repositories don't like 3xx responses, and so a number of his builds fail in Squeak. Pharo uses ZnHTTP, which handles HTTP redirection correctly.
Thanks!
frank