diff --git a/fanboy-adblocklist-stats.txt b/fanboy-adblocklist-stats.txt
index a4d120337..97e51c1d0 100644
--- a/fanboy-adblocklist-stats.txt
+++ b/fanboy-adblocklist-stats.txt
@@ -1,5 +1,5 @@
 [Adblock Plus 1.1]
-! Checksum: fUCxIxbNz4yRazhChb9rmw
+! Checksum: P6ie6nV9u4n8hXbIzk47ag
 ! Fanboy Tracking/Stats V3 Blocking
 ! Updated: 9 Jan 2011
 ! This list expires after 5 days
@@ -641,6 +641,7 @@
 /Optimost/*
 /optimost.
 /ordertrack/*
+/optimost_
 /ot_e404.gif?
 /oxtracker.
 /page-track.gif?
diff --git a/iron/adblock-stats.ini b/iron/adblock-stats.ini
index 373b4cb07..3f37c5a89 100644
--- a/iron/adblock-stats.ini
+++ b/iron/adblock-stats.ini
@@ -1299,6 +1299,7 @@
 /opinionlab.js
 /Optimost/
 /ordertrack/
+/optimost_
 /optimost.
 /ot_e404.gif?
 /oxtracker.
diff --git a/opera/urlfilter-stats.ini b/opera/urlfilter-stats.ini
index 1da621158..709f3dc55 100644
--- a/opera/urlfilter-stats.ini
+++ b/opera/urlfilter-stats.ini
@@ -1347,6 +1347,7 @@
 */opinionlab.js*
 */Optimost/*
 */ordertrack/*
+*/optimost_*
 */ot_e404.gif?*
 */oxtracker.*
 */p.iivt.com/js/ni.js