When embedding a piwik report the column description bubbles can are not fully visible.

Please see the demo for reference:
http://demo.piwik.org/index.php?module=Widgetize&action=iframe&widget=1&moduleToWidgetize=Actions&actionToWidgetize=getPageUrls&idSite=7&period=day&date=yesterday&disableLink=1&widget=1

Hover over the column headlines (i.e. page views).