The search function has generally improved, but it
could improve even more, I think:
searching for "circle of confusion" yields no results.
if there are no results because of "of", maybe the
search should ignore the word and match results on
remaining terms. then it would have found what "circle
confusion" found, i.e. [[depth of field]]. (people are
used to google, which drops common words automatically)
some useful words have only two letters. e.g. "pi".
no raw numerical search turns up results. e.g.
"3.1428" or "8 1/2". I doubt that will be crucial, but
it would be nice to have the option.