Upgraded to 4.1, and Apple's "multitasking" sucks. So I go to install Kirikae (used it on 3.1.3) and Cydia wouldn't let me install it. So I install ProSwitcher, phone crashes and goes into safe mode. So I'm pretty much left with Circuitous or Multifl0w. I want whichever one has better efficiency (unless there's a way for me to install Kirikae)?