Version: 1.9 (using 4.0.3 (KDE 4.0.3), Kubuntu packages) Compiler: gcc OS: Linux (i686) release 2.6.24-16-generic It is possible for the ball to get stuck on the inside of the wall. It happens when the ball hits the very tip end of a wall. I will attach a couple of pictures to show what I mean.
Created attachment 24612 [details] How to get kolf ball stuck in wall With the alignment shown, hit the ball and it will go inside the wall.
Created attachment 24613 [details] kolf ball stuck in wall Ball cannot cross wall, no matter how hard it is hit. It can come out through the end of the wall, the same way it went in.
I can confirm this with trunk
*** Bug 156502 has been marked as a duplicate of this bug. ***
*** Bug 186759 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 131488 ***