After choosing to Ignore or Acknowledge a vulnerability in the Dashboard Overview, the top five (5) Issues to Address pane displays No Security Audits performed in the last 30 days even though there are security audits performed in the last 30 days.
LanGuard 2012 (build 20120717)
This is a product defect which has been resolved in LanGuard 20121031_01 patch.
Download and install the LanGuard 20121031_01 patch to resolve this issue. After you install the patch, re-scan the machines.