It is 'insinuating' that there is a new build and that you must update.
I downloaded the newest one directly before playing. And yes, I replaced the old one with the newest build.
It only confirms that it sucks and it's not so awesome as you think, because it doesn't know how to read time. It reads local time, and not UTC, as it should.
It isn't really a bug, but Hawaiians and West Coast Americans need to wait to midnight after releasing a new version early in a day, for this message to stop appear.
If it's insinuating something that's the need to move few timezones east.