When accessing eZ Publish over webdav, the eZExpiryHandler is initialized before the siteaccess is changed. This causes the eZExpiryHandler to write its expiry.php in the wrong directory if a custom VarDir or CacheDir is set in your siteaccess, an therefore the Website won't notice that for example the template-block-cache has expired.

I've attached a patch that modifies the changeAccess function so it reloads the eZExpiryHandler if one is already set an not modified.

Steps to reproduce

1) Set a custom VarDir or CacheDir in your siteaccess
2) Upload a file over webdav that normaly would cause the template-block-cache to expire
3) Watch eZ Publish update the wrong expiry.php (the one in the default VarDir/CacheDir path)