error when click on Mark Forums Read

[IRANCITY]

hi dear
after i upgrade my vbulletin 3.8.4 to 3.8.5 i have problem , when i click Mark Forums Read i see this error
Your submission could not be processed because a security token was invalid.

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.
what am i doing ?

[Speysider]

See sticky thread by Homeworld'sa (me) in the vBulletin 3 support forum on vBulletin.com
Link: 3.8.5 Renders Mark Read Script useless. *READ ME FOR A FIX* (http://www.vbulletin.com/forum/showthread.php?345842-3.8.5-Renders-Mark-Read-Script-useless.-*READ-ME-FOR-A-FIX*)