Every time package libqwt-dev wants to upgrade, apt-get aptitude, update manager. It always updates and ask again :(
1. install the new version from -proposed
2. refresh update-manager
-> see that qwt-dev doesn't need any update anymore.
This should not change anything as it only changes the packaging metadata in a very obvious way.
DistroRelease: Ubuntu 11.10
Package: libqwt-dev 6.0.0-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic i686
Date: Wed Jan 25 11:25:34 2012
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
PATH=(custom, no user)
UpgradeStatus: No upgrade log present (probably fresh install)