We're trying to significantly improve the user's ability to deal with edges and faces in the region around creases or the edge of the surface. There are actually some "zero-width" faces in these regions of the mesh, and at the moment there's no way to select them in most of the tools. We're changing the UI to make these parts of the mesh selectable, and we'll be releasing a new build just as soon as it's working.
Thanks for your patience with us










