Once again Maple has screwed things up in a new version. The material in my book, Differential Geometry and its Applications, on unduloids using elliptic functions doesn't give the correct pictures in Maple 10. Maple 9.5 worked fine. Also, something has been done to the simplification routines. In Maple 9.5, the metric and second fundamental form for unduloids are simplified to a point where they can be easily identified. In Maple 10, all that you get is a huge mess. At the Maple Workshop in 2002, I asked about these issues that have cropped up before (the worst being the transition from the wonderful Maple 4 to the horrendous Maple 5). I was assured by Maple developers that such things wouldn't happen in the future. And, indeed, the move from 8 to 9.5 wasn't too bad. But now, here we are again. Authors write books using a version of Maple and the next version makes their work obsolete. This can't go on. Perhaps we must abandon Maple because it is simply not stable.