It works for me. Current version of wordpress [3.6] broke the wiki source code however around the function $wpdb->prepare() which now requires two or more arguments. Current wiki code only passes one argument. I fixed this issue by adding a dummy value of 0 as the second argument in these classes:
WikiDashboardWidget line 12 of wiki_dashboard_widget.php
WikiFeed line 44 of wiki_feed.php
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