On Tue, Jul 19, 2011 at 02:48:29AM +0200, asmagal at fc.up.pt wrote: > I would be most grateful for expanded info about the Lady Heather > red message: > > "OSC age alarm" Sounds to me like it's at the edge of (or even outside of) DAC tuning range. i.e. the Thunderbolt may not be able to discipline the oscillator correctly. What's the DAC voltage? --msa