Try to create a new window, type a bit in it, and the save it as "test file" on the desktop.
1) it does not appear in the window menu
2) the pop-down menus (Unix and Text) become lame
3) sooner or later the menu update error "key varmodes not known in dictionary"
Good catch. Indeed the winChangedNameHook was not called in the case of a window which does not have a file on disk. This is fixed now in the method -[setFileURL:] of class AlphaDocument.
Points 2) and 3) were just consequences of point 1).
Fix committed to svn (rev. 1060 (sourceforge.net)). The core must be rebuilt (see TN #1: How to update the core).