Search for "foo" in the registry. The results listed don't actually include the string foo. If you search for "gnome", the first hits in the results don't include the string foo.
It would be much better usability if results that didn't include the text in which the match was found (i.e. "foo" was matched in the description, but description isn't displayed in the listing) were separated or described separately. Perhaps having "Title and summary matches" and "Matches that contained 'foo' in the description:" sections in the search results.
Alternatively, we should include the chunk of text in which the results were found, which is google-style. I believe the former solution is still a bit better for this specific case, though.
May be related to bug 1022.
I like the Google approach -- it at least tells you *why* a particular result matched, without the complication of splitting the results into multiple sections.