I'm not sure why, but the 404 errors occur because the Learn SpeedGrade show on Adobe TV is down right now. We'll be fixing that as soon as we can.
In the meantime, you can get to most of those topics at an alternate location, so please use these links:
Adobe Community Help & Learning team
Here are links to the documents for all CS6 applications, in both PDF and HTML format:
Thanks. Hardly a manual with 50-odd pages. But I know you are working on a proper manual.
Unfortunately the pdf does not contain the keyboard shortcuts and thus is not complete when working offline; the whole idea behind a self-contained document...
The keyboard shortcuts are included on page 17 of the PDF.
The PDF lags a bit behind the web content right now. The web-based Help is more complete because we continue to publish new topics there each week. Here's the link to the main SpeedGrade Help:
The priority is to publish new articles on the web and then update the PDF.
I found a goog guide on old Speedgrade site..