On a lot of these the Google result shows as "Sometext - Untitled Document" even though the <title> tag is plain "Untitled Document". For instance, the result for http://www.pinholephotography.org/Solargraph%20instructions.... gets "Instructions - " added to it.

Is this a Google feature? Where's the "Sometext" coming from?

It seems when designing pages in Dreamweaver the "Untitled document" defaults in <title> tag. Now Google has found this and altered search result so as not to show the "Untitled document" as a result but something more relevant.