Even with only about a quarter of the house full, the nerves were running kind of high - I'd say not for me, as I was too tired to be nervous, but I still sang when I wasn't supposed to during the first act, and forgot my kick-steps during the dance off. However, another actress actually spoke over someone else's lines, twice, so it could have been worse for me. I did manage quite nicely to redo my hat and hair right before the entrance to the grand finale in about two minutes, as I was walking on stage, since they gave up the ghost right as our cue sounded.
Overall, energy was better - the duke gave us a stare-down during the first scene with the maidens, as if to say, "What the HECK are you wearing?" (see pictures here), which he made up just last night - and was VERY good. Also, the major did an improv bit where he made a dragoon pick up his lost epaulet - big time improvy thing, GREAT for laughs, a good way to handle the rather uncomfortable situation of a large shiny thing laying in the middle of a big empty space. I think it will be even better tonight.