Using Firefox 3.6.3 on KUbuntu 10.4, with Ghostery & NoScript also installed.
I have added mercurynews.com to the ABP preferences, but no selection of checking or unchecking the boxes for (from mental memory) "my filters", & the mercurynews.com checkbox, permit the mercurynews.com Frys ads to display.
The only way I can get the ads to display is to disable ABP completely:
Edit > Preferences > General > Manage Addons > Extensions > ABP
then shutdown & restart firefox.
Then, when done looking at that site, I have to go back & reenable ABP.
Thanks

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On
http://www.mercurynews.com/
Click the link halfway down the page, right side: Fry's
That takes you to:
http://newspaperads.mercurynews.com/ROP ... dvid=32664
Only with ABP disabled completely do the daily ads show up.