possible gtk bug

There may be another little XEmacs --with-gtk bug; does anyone else get these symptoms? GTK programs have a menu that you can pull off and put somewhere else. When its menu is pulled off the XEmacs frame resizes itself, becoming taller by one. When it is re-attached, the XEmacs frame resizes itself, becoming shorter by two and narrower by one. The frame shrinks! If I repeatedly detach and re-attach the menu then the frame will shrink to about two thirds of its original size, but no further. This occurs on my system with XEmacs 21.5.3b and 21.4.5, built --with-gtk, using either the sawfish or xfwm window managers. It doesn't happen with an old XEmacs 21.1.12 (GTK). -- John Paul Wallington