After my earlier reply, I've had another look. Problem #1 - Is the blinking the wireframe being redrawn? with mine, the blinking appears to be the view resetting slightly, and now only appears when a view window is selected. The original blinking seems to have gone - this is after reducing the openGL draw settings from maximum, and turning done the number of openGL lights. Problem#2 - I assumed that you were talking about the procedural terrain editor window, where you can select an altitude production function or a filter - two small windows top right hand side. That's where it will let you select the function or filter, but seems to only apply the first one selected and ignores any others.