I have the same issues, on gentoo and ubuntu (stable). Also I have experienced an issue when resizing maps, the window does not update to reflect the change, but it used to in the last "stable" version (which had more memory leaks if I remember correctly). The issue with loading larger maps, would be with the memory allocated for runing the editor, which can be changed with a command line option, which I don't remember atm. -- -- Andrew Fuchs