An explanation not yet mentioned is u beeing kicked due to mods. Resently, especially since 4.09 there have been an bombastic increase in random kicks.

My guess is 4.09 dont like mods ;)

Seriously though, iv been kicked for no reason more times in the last 6 months than previouse 7 years put together. (not counting lag issues etc of course)

3-4 kicks a night isnt uncommen, luckely i dont fly much anymore :)


Edit: Saw that u said u had no mods, but im uncleare if server uses them.