apache rewrite problem

rewrite.log

[rid#7f05d59e80a0/initial] (2) init rewrite engine with requested uri /img/skylight-logo.png
[rid#7f05d59e80a0/initial] (3) applying pattern '^(.*)$' to uri '/img/skylight-logo.png'
[rid#7f05d59e80a0/initial] (4) RewriteCond: input='/img/skylight-logo.png' pattern='!-d' => matched
[rid#7f05d59e80a0/initial] (4) RewriteCond: input='/img/skylight-logo.png' pattern='!-f' => matched
[rid#7f05d59e80a0/initial] (2) rewrite '/img/skylight-logo.png' -> '/index.php?url=/img/skylight-logo.png'
[rid#7f05d59e80a0/initial] (3) split uri=/index.php?url=/img/skylight-logo.png -> uri=/index.php, args=url=/img/skylight-logo.png
[rid#7f05d59e80a0/initial] (2) local path result: /index.php
[rid#7f05d59e80a0/initial] (2) prefixed with document_root to /var/www/mysite/current/webroot/index.php
[rid#7f05d59e80a0/initial] (1) go-ahead with /var/www/mysite/current/webroot/index.php [OK]

vhost.conf

<VirtualHost *:8080>
  ServerName mysite.com

  # note 'current' is a symlink to a timestamped release directory elsewhere - could this be a problem?
  DocumentRoot /var/www/mysite/current/webroot
  
  <Directory /var/www/mysite/current/webroot>
    Options FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
  </Directory>
  
  <Directory />
    Options FollowSymLinks
    AllowOverride None
  </Directory>

  <Location /server-status>
    SetHandler server-status

    Order Deny,Allow
    Deny from all
    Allow from 127.0.0.1
  </Location>

  RewriteEngine On
  RewriteLog /var/log/apache2/mysite-rewrite.log
  RewriteLogLevel 9

  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^(.*)$ /index.php?url=$1 [QSA,L]

</VirtualHost>