Adam,
The problems I asked about seem to be fixed (at least on the example you referenced). I haven't downloaded the lastest build so I can't comment on whether the PasteHTML problems is solved yet.
I have, though, noticed another odd bit of behavior having to do with Copy/Paste operations.
To see what I'm talking about, try this -- enter some text between some quotes, like this: "sometext". Double-click the text so that it's selected, then press Ctrl-C, Ctrl-V, thus copying and pasting the text on top of itself. You'll notice that the pasted text includes a trailing space character not included in the copied text.
James