Nazgul

Try adding a trailing slash, thus making it:
andykillworth.co.uk/blog/

Check your settings at “Options -> General” and then the “Weblog URI” option. (4th option, I don’t know it’s exact name because my WordPress isn’t English and I’m too lazy to switch and look)

What is this option set to? “Options -> Permalinks”

Try setting your “Options -> Permalinks” to default and see if that fixes it.

If it does, take a look at this page.

I’ve changed the fixes from that ticket back to the way they were in 2.0.2 and that solved the issue for me.

I think it’s a ‘useless’ fix anyway, because I don’t know of any regional setting where the name of a day or a month (see below) start with a literal number, thus making the fix void anyhow, except maybe for esthetics.

The replace takes place on:
D (A textual representation of a day, three letters)
F (A full textual representation of a month, such as January or March)
l (A full textual representation of the day of the week)
M (A short textual representation of a month, three letters)

I’m experiencing the same problem.

I think it’s related to ticket #2564, which was included in the 2.0.3 release, but I don’t know why this is happening.

Edit: my date format is: “j F Y”