Have you tried using a clean install of Blockland.
One with only default addons
It could be some poorly coded client addon
yes i have
How much ram do you use when playing the game? (Open Task Manager, go to performance, watch "Memory")
a lot of this is actually coming from firefox though
Try updating your network drivers?
i haven't, though this MAY be a solution
blockland isn't the only one causing trouble; steam is also being a bitch, sometimes going into a period where none of my messages are sent and i don't receive new ones, and i have to restart it to fix it;