fixed in ncftp-3.0.beta21-1, in the next Raw Hide release.

The fix did not appear in Rawhide ncftp-3.0beta21-1.i386.rpm or
ncftp-3.0beta21-2.i386.rpm.  Both still have Terminal=1 in
ncftp.desktop. Because Gnome interprets 1 as false, no window appears,
and ncftp complains into ~/.xsession-errors.

OFFENDING FILE: = /etc/X11/applnk/Internet/ncftp.desktop

POSSIBLE SOLUTION: replace Terminal=1 with Terminal=true

TO VERIFY THIS BUG, DO rpm -Uvh --allfiles ncftp*.rpm.
Then try to run ncftp from the Gnome|Internet menu.
Otherwise rpm will not replace your current ncftp.desktop.
It's a config file.

This is the only remaining .desktop file that contains Terminal=1,
after applying all RH6.1 updates and Gotchas fixes.  Lots of them
contain Terminal=0.  Gnome might need to understand 1 as an alternate
for true, but it doesn't in RH6.1 with all updates and gotchas fixes.

I believe the current fixes are in the GNOME and KDE
libraries, in that they now both understand the
same syntax.

All my rpms here are upgraded to the current Rawhide, but the "Terminal=1"
in ncftp is still interpreted as Terminal=false and ncftp won't come up.
Maybe in the next Rawhide?