watchdog errors

Hi,

I get lots of errors in watchdog since I think when I upgraded to Drupal 7.14. I am using authcache together with filecache.

First watchdog moans that the authcache.js file cannot be found. The url seems wrong with a relative path on top of a static path:

http://www.domain.co.za/var/www/vhosts/domain.co.za/httpdocs/sites/all/modules/authcache/authcache.js?m3khnb

And that is followed by a bunch of other notices like:

USER	Anonymous
LOCATION	http://www.domain.co.za/var/www/vhosts/domain.co.za/httpdocs/sites/all/modules/authcache/authcache.js?m3khnb
MESSAGE	Notice: Use of undefined constant E_USER_DEPRECATED - assumed 'E_USER_DEPRECATED' in _authcache_shutdown_save_page() (line 183 of /httpdocs/sites/all/modules/authcache/authcache.helpers.inc).

etc...

Is this something i'm doing wrong?

Thanks