Thats strange, have you made any major changes to your home page recently or noticed any traffic coming from places that it doesn't normally come from?

A page on my site disapeared from Yahoo the other day, then 3 days later it was back .. :S

I also experienced the same thing.. Is this normal?

do seo u will get back your homepage in yahoo.

I think this is not a big issue here. Some time yahoo miss your site on specific key word, but it will come back with in few days on its initial position.

contact yahoo they will help u.