Looks like it. The following panel launchers stopped working on my parents' system after the upgrade:
[Desktop Entry] Version=1.0 Encoding=UTF-8 Name=Thunderbird Mail Client Comment=Read and write your email Exec=mozilla-thunderbird Terminal=false MultipleArgs=false Type=Application Icon=mozilla-thunderbird.xpm Categories=Application;Network
Looks like it. The following panel launchers stopped working on my parents' system after the upgrade:
[Desktop Entry] thunderbird thunderbird. xpm Application; Network
Version=1.0
Encoding=UTF-8
Name=Thunderbird Mail Client
Comment=Read and write your email
Exec=mozilla-
Terminal=false
MultipleArgs=false
Type=Application
Icon=mozilla-
Categories=