For instance, I run the unstable wordpress on a wheezy machine. And each wordpress upgrade is painless, but a full upgrade to jessie would be much more time consuming.
I agree for wordpress.But roundcube is a litle different. You don't have to run it on the email serveur. It's just a box with a config file but no data. When you upgrade roundcube version, you have to upgrade the config file most of the time.
gaby PS : but a new roundcube will be pleasant for me too ;-) -- Gabriel Moreau - IR CNRS http://www.legi.grenoble-inp.fr LEGI (UMR 5519) Laboratoire des Ecoulements Geophysiques et Industriels BP53, 38041 Grenoble Cedex, France mailto:Gabriel.Moreau@legi.grenoble-inp.fr tel:+33.476.825.015