Do not apply the update (like I did) because;
VISIONary and rage DO NOT yet work with it
Superuser.apk and the su binary need updated for it
Its not yet known if the old ENG-HBOOT works, or if gfree works
Just wait. Or apply a ROM which has been updated to use 1.72 as a base (MCR?)
There is no way back. No root method.
Don't complain in Pauls VISIONary thread that it doesn't work anymore. He knows.