OS X users launching Architect from the Dock get a blank Architect window
Architect has a bootstrap that needs to be run (the app from Applications). When you right click an choose to 'Keep in Dock' it's actually pinning the end game application which won't work.
Windows users with UTF8 character(s) in the OS user name can't launch Architect. The workaround until we get this fixed is to change your OS user name.
In build 971 Architect started checking the signature of meta files it read in. Mainly this was due to outside applications creating copies (tmp) of meta and Architect getting confused. The meta file name now must match the userClassName stored inside of it. This tells Architect it's a legit meta file and not something created by source control or another IDE.