As far as Mnemosyne's development is concerned, as mentioned before, please report bugs against the latest released version, 2.6.1 currently. 2.4 is really ancient, and Ubuntu should update its version.
As far as Mnemosyne's development is concerned, as mentioned before, please report bugs against the latest released version, 2.6.1 currently. 2.4 is really ancient, and Ubuntu should update its version.