Re: Strange problem with latest CVS

[Richard Stallman]

    I'd just like to add that mh-e also has this problem when displaying
    mime buttons and parts.  It was fixed by setting the overlay 'evaporate
    property to t.

    In any case it seems like a change for the better.  Previously all the
    gui-button faces would shrink to zero-length overlays and remain there,
    invisible, when the buffer contents were deleted and new contents
    inserted.  I now see that a lot of overlays accumulated after may reuses
    of the same buffer.

It sounds like THESE overlays should be set to evaporate.
But I think MH-E should do that.  I cc'd the MH-E maintainer.