TBird Major Update Update

I mentioned earlier in the Weekly Update 2007-08-06 post that there is going to a major update to take TBird users from the 1.5.0.12 to the  2.0.0.6 build. I got to thinking about this and something didn’t make sense.  If the Major Update feature is still being tested, how could it be included with TBird 1.5.0.12? I am guessing they meant to say TBird 1.5.0.13, which is in the works. Fx 1.5.0.12 included the Major Update feature, so may be that is where they got 1.5.0.12 from.