Visual editor (in 3.2) removes object alignment & styling after save

I just upgraded to WordPress 3.2 and I’m noticing annoying behavior in the visual editor. Whenever I switch to the visual editor, or save and reopen a page in the visual editor, it strips out alignment and class I’ve assigned to an object. In this case, I’m embedding a YouTube playlist object. For example, when it’s working properly, the YouTube player floats on the right and is styled (via class id) with a dropshadow. When I save and re-open the page, the player object is left-aligned, in-line with text, and the dropshadow styling is lost.

I’m hoping that there’s just some easy setting I forgot to switch on. Any clues? Thanks!

Matthew