An older thread about this here.

I'm sure it's a lettering job, as Mark says in the older thread.

Thank you. I tried a search, but it didn't work.

Hello again. I made my earlier comment from work, but now I am at home, looking at the booklet from the remastered and expanded Rumours CD (2004)... The band name and album title on the cover are indeed handlettered, by Larry Vigon/Vigon Nahas Vigon.

http://www.larryvigon.com/