Asp.Net CDN Minified JQuery Not Gzipped?

Question

Does anyone know if there is a reason why the minified versions of the jQuery files on the Asp.Net content delivery network are not gzip compressed? The non-minified versions are properly compressed.

Examples:

http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.unobtrusive-ajax.js (GZipped) http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.unobtrusive-ajax.min.js (Not GZipped)

If I look at the Google CDN, the minified files are also gzipped. Unfortunately they are not offering jquery.unobtrusive-ajax, jquery.validate, or jquery.validate.unobtrusive.

HTTP/1.1 200 OK
Cache-Control: public,max-age=31536000
Content-Type: application/x-javascript
Accept-Ranges: bytes
ETag: "075379efba5cb1:0"
Vary: Accept-Encoding
Server: Microsoft-IIS/7.5
VTag: 279431312700000000
P3P: CP="ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo PSA PSD TAI TELo OUR SAMo CNT COM INT NAV ONL PHY PRE PUR UNI"
X-Powered-By: ASP.NET
Content-Length: 2745
Age: 6009332
Date: Tue, 24 May 2011 18:13:59 GMT
Last-Modified: Mon, 27 Dec 2010 19:24:02 GMT
Expires: Thu, 15 Mar 2012 04:58:27 GMT
Connection: keep-alive

Thanks,

Sam

Answer 1

Not sure what was going on, but now the files are showing gzipped. As mentioned in one of my comments, it seemed to change when I went from one I.P. to the other.

Answer 2

My FireBug sees them (both) gzipped:

Answer 3

Are you behind a proxy? At work our proxy rips out the compression on some files before it reaches each client