Why do I see update-like marks in Synaptic Manager (Mint/Xfce) although there is no update available? I'm in Linux Mint 14, Xfce. In Synaptic Manager I see these marks that seem to indicate an available upgrade, but there isn't any. !enter image description here Update manager finds nothing to upgrade. For other programs these marks are absent: !enter image description here Is there something amiss here? (Maybe related to the fact that I have upgraded Thunar as shown here which I guess upgraded Xfce too.) What are these marks?

The package you selected is up-to-date, you can only do re-installation as the Synaptic Package Manager suggested.

If your `update manager` is not showing any package to upgrade, try update the package cache, IIRC there's a `Update` button you can click on (or `sudo apt-get update` in CLI). If it still contains nothing, there's no package update available.