ciml - 6:53 pm on May 20, 2011 (gmt 0)
/robots.txt gets into Google via links (sometimes from server statistics pages) which is why Google sometimes uses anchortext for the title. But sometimes not, as with these listings from Google itself [google.com]. How Google picks which anchor to use is a mystery to me. As Tedster says it's query dependent but I still find the choices odd sometimes.
jabird's issue for this thread is a bit different though. It looks more like Google's building breadcrumb-style titles for his pages, from internal anchor hierarchies. Taken with the missing description and cache links I would say that the URLs just aren't being fetched (even though they have cache from a few days ago).