All true, and I did notice this before 10.2.2, but the http requests back to mac.com only happen for mac.com addresses. I've also had a custom photo in my address book for some time now, but I never put the vCard in my .sig. Guess I should check that out...
I'm not sure about this, but I wouldn't be surprised if you had your own pic in your entry in Address Book, and added your vcard to your .sig, then other Mail users might see your pic when they viewed messages from you. Shouldn't be too hard to test.
1
Julian Missig
11-13-2002
03:55 PM ET (US)
... and if you want your own little picture in Mail.app without shelling out cash for .mac, check out MailPictures: http://www.nikwest.de/Software/