I've had the same problem with mine as well and even changed my signature to a new ticker and still pops up the old one! I tried the whole save a bunch of times but still doesn't work. Hope it works for ya!
RIP my sweet girl born 11/26/12 sleeping at 15 weeks.
Re: Can't change my signature and avitar?
I'm in the same boat! Hope this works out soon.
edit: Of course, there goes mine as I complain..
My Ovulation Chart