I was nearly finished with a live recording (aprox 1hr 10min long). I went back to the beginning to give it another listen before I bounced it and found that nothing sounded right. Upon inspection I found that all of my Logic compressors had changed to Platinum Digital and they all had the same default settings. And EQ's (Waves F6) had all lost their settings. I'm not sure what else has suddenly lost its settings.
Did I inadvertently hit an "I hate my life" command that I'm not aware of or is this yet another issue with 10.5?