If I navigate here: http://ajax.microsoft.com/ajax/jquery/jquery-1.4.2.min.js

I download 70k using Firefox 3.6.3 and I can confirm it is sending Accept-Encoding: gzip.

If I use the Microsoft one: http://ajax.microsoft.com/ajax/jquery/jquery-1.4.2.min.js

I download 30k (and it comes through as Content-Encoding: gzip)

I am also experiencing this when using jquery 1.4.2 in regular sites eg jquery.com. Funily enough, stack overflow which references jquery 1.3.2 on the google cdn, is coming through gzipped.

Why is this happening? Is it some kind of issue with google or am I missing something?

I live in Melbourne, Australia.