Ah. Just noticed a teensy-weensy bug. Before you did such splendid work on speeding up scrolling, automatic substitutions (e.g. smart quotes etc.) worked flawlessly.
Now, however (beta c4), they don’t. Well, that’s not quite true – smart quotation marks still work fine, but smart apostrophes (which did work fine) no longer happen: you have to go back over them, at which point they do change into elegant apostrophes.
I know it’s a tiny thing, but so elegant is Agenda that I feel it needs to be brought to your attention!