I can understand DorsetDunk's sentiments... I've been having quite a battle with the furry little tree rats, too (have discovered that vaseline- marinated with very hot chopped up chillies smeared on the bird station pole- is NOT appreciated by squirrels AT ALL

)
but when I'm in the park, I'm as bad as a child when it comes to giving them monkey nuts... they are cute and soft, and get away with murder, basically.
I think it's a really nice capture, Tringa- I wish I could give advice on the settings, but that's something I'm still struggling to understand. Numbers and me don't get on at all.
The detail of his fur is lovely- all beautifully in focus, (and that's not easy to do with creatures that are notoriously twitchy

). The only fault I can see is in the lighting... a bit of sun would have picked out the red highlights on him really nicely, but I know that's something that those of us trying to photograph wildlife in the UK often have to do without!
All in all, I think it's a good photo of a (sometimes unpopular) wee beastie.