Well, I won't yell at you for saying that. I don't know what Smeegol is but I think they mean binary compatibility with Meego. If you have the source for the program you can make it run on any linux/x11 distro. But for a binary (possibly proprietary) program to work on both Smeegol and Meego they must use ABI compatible versions of all packages that they are built on. Nowadays most stuff just works but sometimes things break when packages (i.e Qt) are not of the same version. For me Meego could just as well be called Fedora Mobile.