Upgrading cvs from 1.11.21 to 1.12.13

[Zanabria, Moises]

Guys,
Besides the News at
http://cvs.savannah.gnu.org/viewcvs/cvs/ccvs/NEWS?rev=1.341&content-type
=text/vnd.viewcvs-markup 
Do you have a features compare table, where I can see all the features
in 1.12.xx over 1.11.x ?

Is there any risk upgrading our cvs binaries from cvs 1.11.21 to 1.12.13
?

Server/Client should same version level?
Or clients can work using 1.11.x?

WinCVS/CVSNT clients works well with 1.12.X cvs server?

Thanks in advance for any advise.

Moises.