Wow, directly on tip? That seems to speak very highly of the day-to-day development stability of Go.
To select a suitable tip build we use http://build.golang.org/ and https://groups.google.com/forum/?fromgroups#!forum/golang-de... . My recommendation would be to find a one or two week old build that passed all checks, do a quick skim of the mailing list to make sure there weren't any other issues and use that revision. Also, you will see some the the builders are broken-
Of course if your application has automated unit tests and load tests, run those too before a full deployment.
If stable means suitable for production, Go tips vastly improved performance, especially in regards to garbage collection, make it more suitable than 1.0.3 for large/high-scale applications in production.