This appears only when EasyList is not subscribed because of the apple.com whitelist string. See http://www.apple.com/macosx/features/timemachine.html
Thumbnails won't open because of tracking.js| and /s_code_$script
[Tracking] apple.com [fixed]
I have added the IDENTICAL whitelist string to the Tracking Filter ... that should do it (it's treated like one filter).
"Experience is something you don't get until just after you need it"