around line 344 of ezstaticccahe.php:

if ( !is_dir( $dir ) )

{ eZDir::mkdir( $staticStorageDir . $dir, 0777, true ); }

should likely be:

if ( !is_dir( $staticStorageDir . $dir ) )

{ eZDir::mkdir( $staticStorageDir . $dir, 0777, true ); }