A really interesting post by Mo Volans on why it's important to keep your drivers up-to-date. [url]http://www.macprovideo.com/blog/audio-software/latest-drivers[/url] Remember to backup your system before doing any major software upgrades though! See Toby's post for more details: [url]http://www.macprovideo.com/blog/logic-pro/backup-logic-system-find[/url] :)