Linkedins support site URLs (hosted by custhelp.com) used to look something like this http://linkedin.custhelp.com/cgi-bin/*linkedin.cfg*/php/endu...

I know custhelp used to be particularly insecure right around when this hack happened, as I myself discovered several vulnerabilities back then.

>Also, when you say '"confusion"', do you mean it was feigned?

Partly. From what I recall it took them quite a while to own up to this very easily verifiable hack, which could very well have been because they couldn't figure out why it happened because it didn't actually happen on their systems.