Using QGIS 2.6.1 Brighton on an IMac (10.8.5). QGIS 1.8 Lisboa with exactly the same two vector shapefiles and the same CSV file works. I joined the file containing the polygons showing the features on my archaeological site to the csv file. Used the query function and in 1.8 all of the features stay the same color except those that match the criteria. They turn another color. I can then save that layer.
In 2.6.1, the same procedure results in my being able to individually select a single feature and all the rest disappear. Presumably that's a new feature in this version and that's fine. But if I use any of the database material in the csv file as a search criteria, it tells me nobody's home, which is obviously not the case. I've tried on several different headings with the same result.
I've completely uninstalled QGIS and all of the associated files, downloaded the latest and still have the osgeo problem of not loading despite it saying that it references 1.11 as it should.
Any ideas on how to fix this?