A Lifehacker report led me to Something Awful Forum , a forum I must confess to not knowing. They report that while using Google Web Accelerator they’re seeing forum pages logged in as a user other than their own nickname. As I tried and canned Accelerator, I cannot confirm that this is true, perhaps someone who still has it cen report here.
The fix is to add the forums URL to Web Accelerators “Do not accelerate this web site” list, but that doesn’t make it less of a security risk. It’s worth it to mention that Google-watcher Phillip Lennsen was unable to reproduce this bug.
There is a fuller report on this at BlogNewsChannel
And our old friend "Backback" is also reporting
Jason Fried at 37Signals, the company who developed the Backpack web app, reports that Google Web Accelerator’s pre-fetching was deleting Backpack pages without user consent.