I had experimented with setting nnml-nov-is-evil to 't. I decided to
set it back to nil, and I then ran nnml-generate-nov-databases. I've
verified that all the .overview files are now there. However,
whenever I start gnus or type 'g' in the group buffer it still reads
through all of the nnml directories (which takes a long time). How do
I restore the old behavior?

Victor