daniel@work:~/Code/magento1620$ git diff HEAD^ HEAD
diff --git a/app/code/core/Mage/Log/etc/config.xml b/app/code/core/Mage/Log/etc/config.xml
index a8c30af..4997291 100644
--- a/app/code/core/Mage/Log/etc/config.xml
+++ b/app/code/core/Mage/Log/etc/config.xml
@@ -107,6 +107,7 @@
                     <log>
                         <class>log/visitor</class>
                         <method>initByRequest</method>
+                        <type>disabled</type>
                     </log>
                 </observers>
             </controller_action_predispatch>
@@ -115,6 +116,7 @@
                     <log>
                         <class>log/visitor</class>
                         <method>saveByRequest</method>
+                        <type>disabled</type>
                     </log>
                 </observers>
             </controller_action_postdispatch>