I went back to the settings for my web camera which I'd setup in Pluto (but failed to get operating properly under Pluto), and decided to have another go at getting it working. User and password information were entered, and then I clicked on the "update" button, but then I get an "Invalid MAC Address" pop-up. I remember getting this when I originally set this up, but had gone on to other things.
Invalid? Really? Here is what I have in there, copied and pasted right from the configuration screen:
It looks valid enough to me, so am unsure what the problem might be.