If you’re running a quad iMac (i5) the following technical alert from Avid/Digidesign might be of interest to you:

These machines have not been qualified by Avid yet, but we wanted to let you know of this issue as it came up. Disabling Bluetooth should resolve SWODs, hangs, crashes and other odd behavior when using Pro Tools.

The second technical alert is regarding Eleven Rack and PT LE 8.0.3. If you’re running Eleven Rack on Windows you’re advised not to upgrade.

We are investigating a late breaking issue found with the initial release of Pro Tools LE 8.0.3 for Windows. On Windows systems (XP, Vista, Win 7) with Eleven Rack and Pro Tools LE 8.0.3, a Runtime error can occur after creating a new session. In some cases, Pro Tools quits without saving the session. Given the possibility of losing session data, we recommend that Eleven Rack users on Windows DO NOT update to Pro Tools 8.0.3 until we are able to resolve this issue and make a fix available.