In Yahoo! Answers, I can apparently no longer browse different categories. How can I change the settings to revert back?

I was having the same problem. On that page of questions from a variety of categories that you see, click on any category. It will bring up a tab where you can click on "all categories".

If you find out please let me know!!

you cant. yahoo changed their format

Be patient, Yahoo is redesigning categories. There will now be just 2 categories,
I. Intelligent questions'and responses
2. Stupid questions and responses
.

You can't right now. There is no way to do it but you can get to the categories but it a little harder.

If you want to find a category on this new terrible format just go to the top of the page and Click on Answers Home. Then a new page will open and you have the All Categories list. Now you can just go to the category you want. Easy but it shouldn't be this way.