-image or not.
-
-If you want them to be treated as if they were images, so that they can be made
-invisible, then move the offending URL from the "+block" section to the
-"+imageblock" section of your actions file. Just be forewarned, if make any URL
-is made "invisible", you may not have any inkling that something has been
-removed from that page.
-
-Alternately, you could modify the "block" HTML template that is used by Privoxy
-to display this, and make it something more to your liking.
+image or not. And there are limitations as to what Privoxy can do to "fool" the
+browser.
+
+For instance, if the ad is in a frame, then it is embedded in the separate HTML
+page used for the frame. In this case, you cannot just substitute an aribitray
+image (like we would for a "blank" image), for an HTML page. The browser is
+expecting an HTML page, and that is what it must have for frames. So this
+situation can be a little trickier to deal with, and Privoxy will use the
+"Blocked" page.
+
+If you want these to be treated as if they were images, so that they can be
+made invisible, you can try moving the offending URL from the "+block" section
+to the "+imageblock" section of your actions file. Just be forewarned, if any
+URL is made "invisible", you may not have any inkling that something has been
+removed from that page. If this approach does not work, then you are probably
+dealing with a frame (or "ilayer"), and the only thing that can go there is an
+HTML page of some sort.
+
+To deal with this situation, you could modify the "block" HTML template that is
+used by Privoxy to display this, and make it something more to your liking.
+Currently, there is no configuration option for this. You will have to modify,
+or create your own page, and use this to replace templates/blocked, which is
+what Privoxy uses to display the "Blocked" page.
+
+Another way to deal with this is find why and where Privoxy is blocking the
+frame, and diable this. Then let the "+image-blocker" action handle the ad that
+is embedded in the frame's HTML page.