After reading the posts above about the HandleOFAScalerMessage issue that has been identified with Macs, I decided to look around on the net for more info on this. It seems that several software applications are having the same issues (e.g. Steinberg music software, some versions of Firefox, some Adobe apps, etc). The common thing I am seeing is that the issues most people running these other apps say that they are sure the issues were introduced with the release of the OSX 10.6.7 update. Users running on 10.6.6 are NOT seeing issues. I suspect the Mac users that have not been having any CRJ issues may be running OSX 10.6.6 or earlier. Given this, I am about to do a clean reinstall of OSX and a manual update to 10.6.6 combo (which I have just manually downloaded) and will then attempt to test the CRJ-200 afterwards. If this resolves the issue then I'm personally going to stay with OSX 10.6.6 until Apple, etc resolve the HandleOFAScalerMessage issue as clearly there may be many apps that encounter similar issues under certain circumstances. For example, I saw it two evenings ago being thrown by Google Chrome. I'll post my findings here later.