(not quite) full-sreen

thankfully, the maintainer of the ion3 package on `macports' was able to upgrade
it from 3ds-20060524 (which I used happily up to now) to 3ds-20070203, so I
upgraded and adjusted to the changes in the config files etc.

I know of the persistent problems with filling frames completely with xterms and
such and that supposedly is a xterm problem, not ion's. I  noted that with the
old variant and with the new one, too.

but what I noted now is, that when hitting mod1+<CR> the fullscreen window does,
too, no longer extent all the way  to the screen edges, but rather leaves a
substantial rim where the X11 root screen is visible (I'd estimate 5-10 pixels?).
that definitely was different with the old version which indeed occupied
_everything_ in full screen mode.

is the current behaviour intentionally?
or is it a problem of the mac/osx/ x11 server?

regards,
joerg