[sentinix-list] "null </fo" in Snort alert console

FYI:

Snort appears to be running (sensor is active) on my server and it has worked in the past.  However, sometimes when I go to the Snort activity console I get a blank page and "null </fo" appears at the top of the page.  This doesn't happen all the time, but just thought I'd mention this.

Will