[CentOS-devel] Interesting Centos 4.5 yum weirdness.

I can't make heads or tails of this:

# rm -rf /var/cache/yum/*

# yum check-update
Setting up repositories
dries                     100% |=========================|  951 B    00:00
fasttrack                 100% |=========================|  951 B    00:00
csgfs                     100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
maze                      100% |=========================|  951 B    00:00
dag                       100% |=========================| 1.1 kB    00:00
2X                        100% |=========================|  951 B    00:00
update                    100% |=========================|  951 B    00:00
base                      100% |=========================| 1.1 kB    00:00
2X-extra                  100% |=========================|  951 B    00:00
addons                    100% |=========================|  951 B    00:00
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 1.0 MB    00:00
dries     : ################################################## 4548/4548
Added 4548 new packages, deleted 0 old in 18.91 seconds
primary.xml.gz            100% |=========================|  15 kB    00:00
fasttrack : ################################################## 33/33
Added 33 new packages, deleted 0 old in 0.24 seconds
primary.xml.gz            100% |=========================|  21 kB    00:00
csgfs     : ################################################## 137/137
Added 137 new packages, deleted 0 old in 0.49 seconds
primary.xml.gz            100% |=========================|  52 kB    00:00
extras    : ################################################## 212/212
Added 212 new packages, deleted 0 old in 1.04 seconds
primary.xml.gz            100% |=========================|  77 kB    00:00
maze      : ################################################## 371/371
Added 371 new packages, deleted 0 old in 1.42 seconds
primary.xml.gz            100% |=========================| 1.6 MB    00:00
dag       : ################################################## 6897/6897
Added 6897 new packages, deleted 0 old in 38.10 seconds
primary.xml.gz            100% |=========================| 5.0 kB    00:00
2X        : ################################################## 10/10
Added 10 new packages, deleted 0 old in 0.20 seconds
primary.xml.gz            100% |=========================|  95 kB    00:00
update    : ################################################## 304/304
Added 304 new packages, deleted 0 old in 2.23 seconds
primary.xml.gz            100% |=========================| 580 kB    00:00
base      : ################################################## 1518/1518
Added 1518 new packages, deleted 0 old in 9.47 seconds
primary.xml.gz            100% |=========================| 1.2 kB    00:00
2X-extra  : ################################################## 2/2
Added 2 new packages, deleted 0 old in 0.01 seconds
primary.xml.gz            100% |=========================|  157 B    00:00
Added 0 new packages, deleted 0 old in 0.01 seconds

perl-TermReadKey.i386                    2.30-8                 maze
[root at tcs ~]# yum update
Setting up Update Process
Setting up repositories
Reading repository metadata in from local files
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for perl-Term-ReadKey to pack into transaction set.
perl-Term-ReadKey-2.30-2. 100% |=========================| 3.9 kB    00:00
---> Package perl-Term-ReadKey.i386 0:2.30-2.2.el4.rf set to be updated
--> Running transaction check

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Installing:
 perl-Term-ReadKey       i386       2.30-2.2.el4.rf  dries              30 k
     replacing  perl-TermReadKey.i386 2.30-3.el4.rf


Transaction Summary
=============================================================================
Install      1 Package(s)
Update       0 Package(s)
Remove       0 Package(s)
Total download size: 30 k
Is this ok [y/N]: n
Exiting on user Command
Complete!

# cat /etc/redhat-release
CentOS release 4.5 (Final)

#

Note the apparent disagreement between update and check-update about
what will actually be done (and no nothing has changed on the
repositories in the mean-time, I've rerun it and cleared the yum cache
and the problem persists).

Is check-update using different logic than update?

Maciej