I just put duckduckgo.com on my Ghostery whitelist and now I get about 50 search results - much better! (For reference, I use Firefox 3.6.8 and Ghostery 2.2.1.)
Thank you for your commendable response and support.
Next, I will try to understand zero-click. I wish I could send you a jpg. There is an orange box that says:
Helper (Software) Zero-click Info (?)
(Transportation). More at "Download.com"
which has little to do with my search for "Download Helper".
Perhaps you could expand the FAQ a bit - for example: "Zero-click is useful info that DDG displays in an orange box above the search results. For example, it might be a definition of the search term (yes/no/what?). With other search engines, you have to click on a link - with DDG it appears with zero-clicks!"
Hope you don't mind my suggestions. Sometimes it's hard for developers to give the users a clear picture of what is happening.