Yesterday Gunny and I posted about a noisy alternator. This is what is happening since.

A short while after replacing the alternator with a brand new one (not refurbished), my batterly light now comes on indicating what? The manual says belt problem? Everything is working GREAT, but that light is on. It came on briefly yesterday, but went out. Still out this morning when I took her for a drive. Came back on and stayed on.

Ideas?
Thanks!
Cissy & Gunny