What steps will reproduce the problem?
1. Using X over SSH to render sguil.tk on my Windows 7 machine remotely.
2. At login, selected both SGUIL or OSSEC predefined sensors. Clicked check 
boxes for REVERSE DNS and SHOW PACKET DATA.
3.Clicked on individual event entry to see DNS information and popup error box 
appears.

What is the expected output? What do you see instead?
Expected output is currently selected entry's IP/DNS information.
Instead, the following error (details) appear in popup box:
can't read "state(reply)": no such element in array
can't read "state(reply)": no such element in array
    while executing
"binary scan $state(reply) SSSSSS mid hdr nQD nAN nNS nAR"
    (procedure "Flags" line 13)
    invoked from within
"Flags $token flags"
    (procedure "dns::name" line 3)
    invoked from within
"dns::name $tok"
    (procedure "GetHostbyAddr" line 47)
    invoked from within
"GetHostbyAddr $srcIP"
    (procedure "ResolveHosts" line 23)
    invoked from within
"ResolveHosts"
    (procedure "SelectEventPane" line 105)
    invoked from within
"SelectEventPane $tablelist::W EVENT EVENT"
    (command bound to event)

What version of the product are you using? On what operating system?
Product version is Security Onion 20110116 on XUBUNTU 10.04

Please provide any additional information below.