Hopefully
It suddenly occurred to me just now that the grammatical-purist objection to "hopefully" (that it shouldn't be used to mean "I hope") applies equally well to the common use of words like "actually." I had a momentary thought that this might make a good column topic (no, I haven't forgotten about the column, despite appearances to the contrary), but it turns out someone's already done that, much better and more authoritatively than I could have. Excellently as usual, Michael Quinion explains the hopefully controversy. Turns out it's another fairly recent issue; apparently nobody really objected to hopefully and its ilk until the mid-1960s.