I'm having the same issue as Zorlac; my apps close if I press Home. Rooted the phone yesterday (my first time) and flashed the KA5 with TouchWiz and left Voodoo enabled. Only Market apps I have are games and a few other apps, but no task killer other than stock.
I also noticed the battery drains a little faster and runs hotter.
I also noticed the battery drains a little faster and runs hotter.