On Tue, Sep 9, 2008 at 6:17 PM, Ilmari Karonen nospam@vyznev.net wrote:
I was thinking of having two images, one using a protocol-relative URL and the other not. Log the requests for each image and compare the logs: any client that consistently requests only the image with the explicit protocol probably doesn't support protocol-relative URLs.
Oops, my suggestion was two hours late. Maybe I rely too much on Gmail's auto-threading (which didn't catch this, since it changed the subject).