Hmmm, I made a new character just the other day and didn't seem to have any issues. Although, mine was just a copy/paste.

Where are you joining a roleplay, creating a character for the character pool, or were you moving someone over into a roleplay. I know when I move characters into another story, sometimes I lose information (usually the other/extra section). If you flip browsers, does it still do it? What able clearing your cookies?

Not sure if any of that will help, but it's never any fun to lose all your work! I recommend doing each second one save at a time. So post the description. Then save. Post a personality. Then save. Equipment. Save. I think you get the idea. A bit of a pain, but it might be a temporary fix while people try to figure out what the root cause of this dump is.