• The memory RRD fails to render and the logs contain the following message :
    php: /status_rrd_graph_img.php: Sorry we do not have data to graph for system-memory.rrd

    followed by :

    php: /status_rrd_graph_img.php: Failed to create graph with error code 0, the error is: Array

    I double checked in the system.log itself and indeed the error message is cutoff like that (nothing after the Array word).