Right now, it's closing on 9 AM, and I just got out of the shower. I was getting dressed for work (running late) and wanted to look at my .fla files again. Woohoo! I set a few layers as guides to try to isolate the slowness problem, and I do believe I've discovered the cause! All this, and I haven't even put on a shirt yet today. :D

Good omen for the remaining 24 hours, as tonight's probably going to be an all-nighter.

Off to work...