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I had a redirect in one of our sites (it was after that we had our dominion). I did't mail to Yahoo to change the URL, since rumors were to not disturb Yahoo.. because you scould have risked to lost your listing...!
Fortunately, after one year, they placed the new URL without any imput from us!
So that, I suggest you to have a redirect in the old page.
Angiolo
P.S. Recently I added a site to DMOZ and Yahoo category(in a Regional language): DMOZ was great and listed it after two days!!!! And that category has not an Editor.
I am still waiting for Yahoo.