I have observed that with the last patch, SK's memory leaking habits have gotten worse. After around 5-6 floors, the game will freeze every 5-10 seconds, making gameplay excruciatingly frustrating. I know some friends are also observing this, and people in my public parties have been experiencing severe lag problems much more often.
I want to put this thread out there so OOO is aware, and so that anybody affected can speak out.
Move your thread here: http://forums.spiralknights.com/en/forum/5