Help with mod_rewrite

Answer 1

Too many parentheses. You might have a Lisp infection.

Try:

RewriteRule ^([^/]*)/([^/]*)/?([^/]*)?$ index.php?page=$1&id=$2&action=$3 [QSA,L]

Answer 2

There's a really good one page mod_rewrite cheat sheet here: http://www.addedbytes.com/apache/mod_rewrite-cheat-sheet/