Thanks, Jeff and Andres,
I was thinking the same thing as Jeff. I've been waiting on a new focuser, and so I haven't been out collecting data for a few months. Didn't have a lot of old data to play with, either, so I've been on a bit of an imaging hiatus. I've kept reading the PI forum, though, and have been holding off on installing 1.8, for the same reasons Jeff mentioned. Hearing someone say that the current 1.8 seems to be as stable as 1.7... that's reassuring to me.
I should install 1.8 soon, once my main computer comes back from having its HDD replaced.
Thanks,
Marek