[Outbackmark]

I had the same trouble this took care of it -
Open the template "onetouchban" in Styles and Templates/edit templates -
Find

<form action="misc.php" method="post" name="spamconfirm" id="spamconfirm">

On the NEXT line insert -

<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />

Save and edit the same in other styles if you have more that one running.
No more errors - Remember to turn off the IP ban for your test run or you may ban your own IP!!

I also had a security token pop up in a style that has not been updated with the onset of daylight savings in some parts of the world.
The error occurs when the time trys to adjust to daylight savings on profile.php?do=dst.
This is incorperated into the footer template and the security token needs to go on the nesxt line after -

<input type="hidden" name="s" value="$session[sessionhash]" />