Modification

In order to display the date the displayed pages were last modified (rather than the date the article was first added to the category, though a page refresh, cache cleared, will also show), this extension (1.15-r48711) has been altered on the following lines:

LINE 337
$sSqlSelectFrom = "SELECT page_namespace, page_title, page_id, c1.cl_timestamp FROM $sPageTable";

CHANGE TO:

$sSqlSelectFrom = "SELECT page_namespace, page_title, page_id, page_touched, c1.cl_timestamp FROM $sPageTable";


LINE 448
$output .= $wgLang->date($row->cl_timestamp) . wfMsg( 'colon-separator' );

CHANGE TO:

$output .= $wgLang->date($row->page_touched) . wfMsg( 'colon-separator' );

OR

$output .= $wgLang->timeanddate($row->page_touched) . wfMsg( 'colon-separator' );

The first will display only a date, the second the time and the date.