I have 2 PCs here:

Old: Win2K SP4, Hummingbird Exceed 8, keyboard SGI qwerty US (very
much like a PC keyboard, except no WINDOWS and no MENU key, ie the
botton row has CTRL, ALT, SPACE, ALT, CTRL, arrows)

New: WinXP SP2, Exceed 8, PC qwerty US keyboard.

I took great care to copy the old Exceed config to the new one.

On the old PC, accelerators for a Motif app, defined as ALT+D (eg)
work fine (using the right ALT key)

On the new one, they dont and xev shows that the sequence detected is
rather nonsense:

KeyPress event, serial 22, synthetic NO, window 0xc00001,
root 0x34, subw 0x0, time 12433073, (85,123), root:(320,390),
state 0x0, keycode 36 (keysym 0xffe3, Control_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False