There has been some concern expressed on Twitter and various blogs that Final Cut Pro X’s new “magnetic timeline”, with all of its automatic rippling, could interfere with the process of making adjustments to material that has to meet precise length requirements, like commercials or TV programming.
I noted a couple of days ago that for all anyone knew it could just be switched off, like snapping in the current FCP timeline. Aindreas Gallagher over on the Creative Cow forums may have identified the toggle.
(Clipped from the screenshot attached to this post.)
It could also possibly be the switch on the left here: