Someone at work just told me that they were disintersted in attending a meeting. I think that they actually meant that they were uninterested in going to it.
I think we've perhaps finally lost the battle on this one; 'disinterested' (impartial, doesn't take sides) has finally beaten the more lowly and now less used 'uninterested' (shows no interest) in common usage. Shame. I guess people would rather 'dis' than 'un'.