http://sonata.berlios.de/changelog.html shows that this bug was fixed in version 1.5, but the most recent version in Ubuntu is 1.4.2. I installed sonata from source and the problem appears to be fixed.
https://bugs.launchpad.net/ubuntu/+source/sonata/+bug/221775 also appears to be a duplicate.
http:// sonata. berlios. de/changelog. html shows that this bug was fixed in version 1.5, but the most recent version in Ubuntu is 1.4.2. I installed sonata from source and the problem appears to be fixed.
https:/ /bugs.launchpad .net/ubuntu/ +source/ sonata/ +bug/221775 also appears to be a duplicate.