I have a feeling that Vicar has a memory leak. I was curious why my N900 does so much swapping yesterday, I fired up htop and seen that vicar-telepathy process takes approx. 4% od memory which is quite a lot as for a process that pretty much does nothing (I haven't used Vicar for calling for couple of weeks). I'm now in the process of gathering nightly endurance snapshots so I should have more clues within next few days. I'll let you know my findings.