focus in ediff with many frames X/twm

[Evil Boris]

This seems to work properly in 21.3, but not in current/recent CVS.
This is on Solaris running twm as the window manager.

If I invoke ediff, say to compare two files, ediff starts a little
separate "control frame".  

-- On Windows, this frame gets focus and the pointer gets warped there.
-- On Linux/Sawfish, the same.
-- On Solaris/twm (focus follows pointer), the X pointer gets warped
   into the bottom right corner of the screen!

Any ideas/comments?  Can anyone reproduce this behavior?

    --Boris