I get this error: Error 14 -- Unable to open ~/.qgis//qgis.db -- QGIS version 1.8.0-Lisboa -- Ubuntu 12.04
It was discovered when I tried to define a custom CRS and save it under: settings/custom CRS in QGIS 1.80.-Lisboa under Ubuntu 12.04 and saving the custom CRS indicated this error.
I notice that the qgis.db file is located at: /usr/share/qgis/resources/qgis.db
I created a link but this did not work either. Can I tel QGIS to look for the qgis database at the above location rather that ~/.qgis//? Looks like permissions are read and write for all users.