the custom ad location is not utilising its own CSS
so using within custom blocks it uses the same css as does say a global header ad,
im forced to add ads in ipcontent by using raw html, rather than the custom ad loaction in blocks.
or a reply from ips tech during a ticket;;
Regarding the ad locations... yes they do work, however they do not work on IP.Content pages because those are not passed through the template parser, so they may not display correctly. In this instance, you would use standard HTML to display the Ad and the Link.