Google made a secret pact with the UAE Authorities to give them access to the profiles of the people in their country (either that or have the domain banned in Arab land), unfortunately the SQL was wrong.

A long time ago (1997) this happened several times in different organisations. Caching web gateways set wrongly and cahing the page without any reference to teh query string or form variables.

Really nasty but easy to fix.

Why is youtube mentioned in the title? It's not youtube's fault.