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How does the User card work?

Why has the style of the Gravatar icon display changed for SO, and why is it inconsistent?

An example can be seen in Javascript to Java Applet communication.

Gravatar icons on SO

Note that the first two icons have a shadow, while the 3rd does not.

( If you're accepting votes, I vote for no shadow. My Gravatar has transparency and is designed to blend in with the page - excepting for the huge letters of my initials in red/orange smack dab in the middle of it ;)

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marked as duplicate by Mark Henderson, random Sep 2 '11 at 3:27

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 2 down vote accepted

See the question How does the User card work? for a full explanation but essentially users with a reputation >= 1000 have a user card popup available which is indicated by the shadow.

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OK. Your answer (thank you) explains the image. But on this thread, mKorbel (7985 rep) is not showing the shadow/card. Shouldn't the card be available for them? Is it because they have not filled in biographical data (beyond location)? – Andrew Thompson Sep 2 '11 at 3:31
@Andrew: This is answered in the linked question, but yes, there is a minimum length requirement. – hammar Sep 2 '11 at 3:39
@hammar: My bad - missed that detail. I blame the brain (which isn't working at full capacity today). :P – Andrew Thompson Sep 2 '11 at 3:52

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