Steam recently changed the default privacy settings for all users. This may impact tracking. Ensure your profile has the correct settings by following the guide on our forums.
Update to 6.60 OFW (yes, no typo, official) and then download the 6.60-PRO-B10 (or whichever is the latest reveision) and install it directely from the XMB (comes with a readme that explains all needed details).