software sources third party box says.......

Some of them might have to changed from "intrepid" to "jaunty". Because jaunty needs different repos than intrepid. If you want to know more, please post the individual boxes. They should be in

/etc/apt/sources.list

so you can also post this file.

deb http://archive.canonical.com/ubuntu jaunty partner
deb-src http://archive.canonical.com/ubuntu jaunty partner

deb http://ftp.tiscali.nl/ubuntu/ jaunty multiverse main universe restricted
deb-src http://ftp.tiscali.nl/ubuntu/ jaunty multiverse main universe restricted #Added by software-properties
deb http://ftp.tiscali.nl/ubuntu/ jaunty-updates universe main multiverse restricted
deb-src http://ftp.tiscali.nl/ubuntu/ jaunty-updates universe main multiverse restricted #Added by software-properties

deb http://security.ubuntu.com/ubuntu/ jaunty-security universe main multiverse restricted
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-security universe main multiverse restricted #Added by software-properties
# deb-src http://security.ubuntu.com/ubuntu gutsy-security multiverse

# Repository ppa for winff please see http://code.google.com/p/winff/
# deb http://ppa.launchpad.net/paul-climbing/ubuntu jaunty main #disabled on upgrade to jaunty
# deb-src http://ppa.launchpad.net/paul-climbing/ubuntu jaunty main #disabled on upgrade to jaunty

# deb http://ftp.osuosl.org/pub/pculture.org/miro/linux/repositories/ubuntu intrepid/ #disabled on upgrade to jaunty
# deb http://ppa.launchpad.net/exaile-devel/ubuntu jaunty main #disabled on upgrade to jaunty

# deb http://ppa.launchpad.net/exaile-bzr/ubuntu jaunty main #disabled on upgrade to jaunty

# deb http://wine.budgetdedicated.com/apt jaunty main #disabled on upgrade to jaunty
# deb http://ftp.osuosl.org/pub/pculture.org/miro/linux/repositories/ubuntu intrepid/ #disabled on upgrade to jaunty
deb http://archive.ubuntu.com/ubuntu/ jaunty main universe restricted multiverse
deb-src http://archive.ubuntu.com/ubuntu/ jaunty main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu/ jaunty-updates universe main multiverse restricted
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-updates universe main multiverse restricted
deb http://archive.ubuntu.com/ubuntu/ jaunty-proposed universe main multiverse restricted
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-proposed universe main multiverse restricted
deb http://archive.ubuntu.com/ubuntu/ jaunty-backports universe main multiverse restricted
deb-src http://archive.ubuntu.com/ubuntu/ jaunty-backports universe main multiverse restricted

Well, look for example at Exaile development:
https://launchpad.net/~exaile-devel/+archive/ppa
they currently do not have a jaunty repo. You can also check out other ppa's that you have. Search them via this mask
https://launchpad.net/ubuntu/+ppas?

I don't know when these ppa's will have full jaunty support, but you should probably be able to find older versions in the regular ubuntu repos until that time.

Older versions of the respective packages, I mean.

thank you Bernard,
I gather from you that I could wait for the full support when it happens!?
thanks
John.
at this moment masks and ppas are new to me.

Well, ppa's are basically giving you the latest versions of programs. But most of them are also in the regular Ubuntu repos, just maybe not the latest version.

Somebody must have added these ppa sources though, maybe it wasn't you.