polins on "WP Super Cache is omitting the content area"

This sounds like a conflict with the Ad Injection plugin.
Donncha is working on a new version of WPSC to address the need for dynamic content on cached pages (thanks, Donncha, you are a marvel, and deserve to be paid handsomely by the hosting companies for all the wasted computer cycles you have saved!).
In the mean time, until we see how this works out, I have found that the "Ads by datafeedr.com" plugin is an excellent alternative for displaying dynamic ads, since it relies on Javascript rather than mfunc (based on my admittedly limited technical knowledge).