I have been running Xubuntu 12.10 for over a month now, on 5 machines (old Compaq Evos, runs nice and slim on these old chips). I immediately became afraid of installing the updates suggested in the Update Manager when an update session in one machine disabled the wireless card I had worked so hard to get working (one of those pesky ones that refuses to play nice with Linux).
I later noticed that some updates in the Update Manager don't seem to apply to me, such as a "Unity Toolbar Update". I installed this version of Ubuntu cleanly as Xubuntu so I don't use Unity.
To summarize my question: Should I always install everything that comes up in the Update Manager in Xubuntu or would it be better to skip updates that I think should not apply to my machine?
Thanks in advance.