Hacky fix for Issue #4 and
http://code.google.com/p/android/issues/detail?id=18990
ScaleGestureDetector seems to mess up the touch events, which means that
ViewGroups which make use of onInterceptTouchEvent throw a lot of
IllegalArgumentException: pointerIndex out of range.
There's not much I can do in my code for now, but we can mask the result by
just catching the problem and ignoring it.