1.7.2 v. the latest and 1.7.2 windows dist

Just to set my foggy-headed self straight:

Is 1.7.2 a static point in time we’ve passed already, or is it a reference
to the latest cvs snapshot that will keep changing? It seems to be the
latter, as there’s no v1_7_2 label I can see in cvs, plus
ftp://ftp.ruby-lang.org/pub/ruby/snapshot.tar.gz is dated yesterday.

Then - assuming I’ve got it right, that 1.7.2 is the ever changing latest
stuff, which version of 1.7.2 is in the latest alpha Windows distribution,
and which version of 1.7.2 will go into the final 1.7.2 Windows