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You may have just gotten yourself a tracking cookie:

the "us?mco=MTE2MjI" of "http://store.apple.com/us?mco=MTE2MjI"

(if I'm wrong, I'll happily apologize)
 
You may have just gotten yourself a tracking cookie:

the "us?mco=MTE2MjI" of "http://store.apple.com/us?mco=MTE2MjI"

(if I'm wrong, I'll happily apologize)

I'm not sure, but it doesn't matter. I routinely reset Safari and clear cookies, cache, history, etc.
 
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