Yup! The first time it happened, I thought, "Oh, duh, save button." But even though I made sure to do that afterwards, I keep getting checkboxes that uncheck/check by themselves! I made changes, hit Save, and then realized I'd forgotten X box, and when I clicked Settings again, the checkboxes were in the old pattern (I always notice Currents and Comments, because I _DON'T_ want Currents, and want Comments.)

If it helps, I'm on Windows 7, and in this iteration I'm using IE 10.0.9. (Two accounts, different browsers. The other account still uses the old compose style because I found the beta aggravating a LONG time ago when the beta was new.)