It is not a Alien Dalvik problem. It is just a RAM watcher that starts killing apps when a particular limit has been crossed.
This is done to accomplish an always starting telephone app so it would not start excessive swapping or waiting when a call comes in.
It also tries to avoid stuttering and freezing of UI or apps when starting.
This stuttering and hanging is something I can do on N900 and N9 very easily. I also missed some calls on those devices because the telephone app did not came up in time because of swapping and out of memory situations.
Of course as it is Linux you can tweak and tune values and restore the behavior of the N900 & N9 with a few commands (there are plenty threads about it around here and on tjc)