Etag/Last Modified - the numpty question I've always wanted to know.

[pmeenan]

The E-tag recommendation comes from here: http://developer.yahoo.com/blogs/ydn/pos...ormanc_11/

Basically, if you don't need the dynamic capabilities that e-tags give you then you're better off just sticking with a last-modified. It's not a rule that I feel particularly strongly about (along with the cookies check) which is why they aren't in the grades at the top of the page but once you've done everything else they're worth considering.