I've stabilized a frame using a serial node, but I didn't like the effect. I tried Undo, but it didn't work. I deleted every node in my tree. I've gone back to the conform page, removed the clip, found the original and put it back into the timeline. Back on the color page, the weird stabilizing remains.
In the Stabilizer window menus (icon in the upper right of the window area) select "Clear Track Data". Make sure all the checkboxes in the next window are checked (should be by default) then click Clear.