Equus, none of those ladies are correct answers.
Hint: Of the six occasions when an actress was nominated for Best Supporting Actress and Best Leading Actress the same year, four happened in the last 20 years. In fact, two happened the same year.
I think the answer to your question, Equus, is the Best Silent Film Category.
Thanks Mac!

You make me think, I'm in the neighborhood.
.......THE KID IS BACK!!!
Julianne Moore, Glyneth Paltrow, Jodie foster, Jane Fonda,Dame Judi Dench, Sally Field? (I figure I should be allowed 6 guesses.)
There were at least three categories that were discarded after the first awards, but I can't remember which was discarded for a good reason. The only one I remember (that was discarded) was for direction of a comedy film.
I think Bridge on the River Kwai won 9.
I'm thinking about the actresses question.
Macsm11 - Good Question. Offhand, I know of two:
1993 - Holly Hunter - Best Actress - The Piano
Best Supporting Actress - The Firm
1994 - Emma Thompson - Best Actress - Remains of the Day
Best Supporting - In the Name of the Father
I'm still thinking.
Equus: An award for Artistic Quality of Production, Comedy Direction, Title Writing ad Engineering Effects was dropped the following year. The fewer the merrier, perhaps.
Mac,
...Help me out here. does that mean WE were right. Are we talking the writing for silent movie dialogue?
larry,
...I knew it!..I knew it! Hee-Heeeeee

I LOVE YOU!!....(ahem) I mean er... thanks Pal.
There were three awards for writing in the first year - Adaptation, Original Story, and Titles. Titles Writing was dropped for good after that. However, I only see one award called "Writing" the next two years, and in the third year, "Writing" is gone, to be replaced by "Adapted Screenplay," and "Original Screenplay." That was the 1930-31 award year.
My guesses for actress with two in one year are Diane Keaton and Vanessa Redgrave, but am still thinking about which films it could be for. I feel stronger about Keaton than Redgrave.
Oh, and the upcoming Awards, Macsm:
Julianne Moore - Best Actress - Far From Heaven
Supporting Actress -The Hours
Now we just need three more. I don't think Ingrid Bergman was nominated in both categories the same year. I don't think Streep or Page was either, but I'm not sure.
My typo Mac. Thompson and Hunter were the same year. Wasn't Julianne Moore nominated twice this year? I can't remember.

You do want the actress to have been nominated in both categories for the same year though, don't you?
Louise Fletcher and Marsha Mason also come to mind.
Not sure, but I don't think mac was including this year's awards nominees. Moore was nominated for both.
Jessica Lange - 1982 - Actress: Frances - Supporting - Tootsie
1988 - Sigourney Weaver - Best Actress: Gorillas in the Mist
Supporting - Working Girl
1938 - Fay Bainter - Actress - White Banners
Supporting - Jezebel
You answered Fay Bainter before I got here, Mac. She was the first. I most humbly ask that someone ask a question for me. I wasn't aware of this thread until this evening and am not prepared.

And I must leave now. Sorry and thank you.
Isn't the idea to try to think of it ourselves, not look it up in a book or on IMDb?
Who is the only Nobel laureate to win an Oscar? For which film?