Yes indeedy, there was plenty of edge enhancement visible on the theatrical print I saw as well. Lots of it. We can't blame it on the DVD authoring process THIS time.
It's unlikely this was "filmed" at PAL-speed as it was made for theatrical release.Actually, you'd be dead (no pun intended) wrong with such an assumption. Here's why...
From a general DV “filmmaking” standpoint with intent to blow up to film, it is generally easier to shoot PAL 25fps instead of NTSC 30fps, not only for the slightly better resolution benefit, but also because you'd be dealing with one frame difference instead of six when taking it to film (or rather five and a bit frames given NTSC is in fact 29.98fps and we just round it up). It makes things far less complicated in post-production. Even DV filmmakers in NTSC territories often favour shooting PAL and then going to film for these very reasons. It’s just common sense…
I didn't see the movie, but given 28 Days Later is a UK production, I'd say it's very likely it was shot PAL DV at 25fps as it's just the sensible way to do things if one is going to shoot DV and then go to film. This of course means the audio pitch will decrease by around 4% on the theatrical 24fps presentations. My guess is only the dialogue is affected by this, and that music and the final surround mix was all conformed for 24fps and this may account for why the DVD comes from a film source, and not directly from the digital masters along with the fact the feature also had some minor scenes shot on film.
Dan (UK)