Apt and packages on hold

[James Dietrich <jdietrch@southern.edu>]

I use the apt method in dselect.

I have had the NMUs of several X packages (-8.1) on
hold for a long time and after selecting install in
dselect, it listed those five packages as having been
held back.

After seeing the message this morning about a possible
problem with locales 2.0.7-19981211-1 I also put libc6,
locales, timezones, libc6-dev, glibc-doc, and libc6-dev
on hold pending further information.

However, apt still shows those same five X packages
as being the only ones on hold:
Updating package status cache...done
Checking system integrity...ok
The following packages have been kept back
  xbase xfonts-100dpi xfonts-75dpi xfonts-scalable xfonts-base
0 packages upgraded, 0 newly installed, 0 to remove and 5 not upgraded.

Why doesn't it show libc6 and friends as well?  I'd like
to make sure I'm not overlooking something obvious.

Thanks.

James