RewriteEngine on
SetOutputFilter DEFLATE
RewriteRule ^cache-([0-9]*).css$ all.php?version=$1
#RewriteRule ie6.css$ serve.php?file=ie6.css
#RewriteRule ie7.css$ serve.php?file=ie7.css
RewriteCond %{REQUEST_URI} !serve.php
RewriteCond %{REQUEST_URI} !cache-
RewriteCond %{REQUEST_URI} !all.php
RewriteRule (.*)$ serve.php?file=$1