Okay, first off: The only reason I'm not putting this in the bugs section is because I don't have time for a full report -- full computer specs, sample capx file, etc. Hope it's okay to post it here; maybe you guys could see if the same thing is happening on your end.
When in the animation editor, if you click on 'resize' and check 'apply to whole animation', all frames of the animation are wiped blank, unless you have the very first frame selected, in which case all frames but the first are wiped. I tried in my project, and a couple other sample projects. I am running r71 on an asus eee.
Anybody else experiencing this?