Just 2 days ago, Google Docs's Presentatin functionality was launched.
Philip Lenssen through a post called Ă˘â‚¬Ĺ“Google Privacy Problems Introduced Through PresentationsĂ˘â‚¬Âť says that this feature Ă˘â‚¬Ĺ“introduced a privacy vulnerability for Google AccountsĂ˘â‚¬Âť.
"Using a straightforward hack discovered by TomHTML (which I can detail once Google security got some time to tackle the message they got from us, if they consider it a problem indeed), you can use GoogleĂ˘â‚¬â„˘s Presentations service to grab the name/ Gmail email address of people visiting your website… without them confirming that they want to share their name/ email with you, or share the fact theyĂ˘â‚¬â„˘re visiting your site! Note this only works when the visitor is also signed in to their Google Account, but other than that requires no special programming capabilities (it may or may not work in every context/ with every browser)."
"I emailed mysef a PowerPoint file this morning, every 30 minutes I keep getting the same document added to my account, it's stuck in a loop of some kind and it's broken."
Anyway, after all the problems, the same discussion group posted a message saying,
"Update: Google informed me that the bug is fixed. My tests show this seems to be the case indeed Ă˘â‚¬â€ś I canĂ˘â‚¬â„˘t reproduce the privacy vulnerability anymore."