Sorry for not getting this out sooner. The error messaging should not
be displaying in that way, but I can confirm for you that this feature
is going away. The language displayed should convey this, and we are
working on fixing that.
Unfortunately it had extremely low adoption and usage, and despite
strong enthusiasm from some...it was not enough to save it. Most of
the folks who did use it would also agree that it needed more work,
and given the low usage it wasn't going to be getting that attention
anytime soon. Also, as I've been saying about the recent changes to
Classic, we want to make sure that we streamline when and where we can.
If you guys want to put together your biggest requests for MyYahoo,
I'll be happy to get those over to the MyY team (because I know they'd
love to have you over there).