nope, but unfortunately i have had couple of shutdowns. These were done by purpose. So no long uptime (3 days or more) tests.

I have also applied other tweaks (made tuning file to /etc/event.d/ dir) and still no ill side effects. IMO the biggest difference came with just swappiness 30. I should try to make heavy banging with multimedia/browser + sleep + test how it wakes up when call comes.

still i would like to get more information about purpose of swapon and swapoff commands. Why, when, how?