One example is with nodewords module. Half a year ago it has been updated and some features was removed and a new feature has been introduced to fill the void.
Unfortunatly this feature didn't didn't work wery well.
The update process have some problems too. If you plan to upgrade to a recent nodewords release, you should save the current settings.
Updating a module could be dangerous. Before updating please read the forum and/or the release notes: you will avoid a lot of issues!
