I've always used Dexron II and Dexron III AT fluid (like the factory manual calls for) in my '88 Accord and I've never had any shifting problems to speak of....even after 239,000 miles. I'm seriously thinking about using the Dual Pump fluid the next time since it has additional lubricants compared to Dexron III.
I can't imagine it causing problems but I just wanted to make sure beforehand.
Thanks.