Word to the wise: when you re-open Caustic and the track you've been working on is already open, RE-OPEN IT ANYWAY from your last save.
Lately I've been working on a new EDM track for my wife, as our 11-year is coming up at the end of this month. I've been working while on the bus to and from work; yesterday morning I had it just about finished, with all the patterns completed and sequenced. Then in the afternoon I opened Caustic back up and started working again, changing a few patterns and automations, and quicksaving as I went along, but at one point noticed that the previously finished ending had reverted back to an earlier state. WTF?
So I had to reconstruct the ending to the best of my memory.
Never again will I open up Caustic and just start working. Every session now begins with "NEW" or "LOAD".