Symfony2 CSS images path gets rewritten and I get a 404
In order to load images in your CSS file the path must be "bundles/(bundle name)/images/(file name)"
UPDATE
make sure you have
write_to: %kernel.root_dir%/../web under assetic: in config.yml
and
background: url('/bundles/(bundle name)/images/prev.png') in your css
then run
php app/console assets:install web and
php app/console assetic:dump web