i have tested my battery drain with and without this app.
i just used aaplock to lock conversation only.
as u said app is working fine but i really don't think so because its using alot of battery its using cpu % in background i think when n900 is idle.
i hope you get some time soon to fix this bug so that we all n900 users can enjoy this wonderfull app
as for now i will uninstall this app coz i am not such a advance user i am lil more than a noob but not so skilled to work on app commands
thank you for your hardwork Spartan