bizarre yum behaviour

[Trevor Smith]

As you can see, newpg and libksba are installed on my system:

[root at laptop trevor]# rpm -q libksba
libksba-0.4.7-0.fdr.1.2
[root at laptop trevor]# rpm -q newpg
newpg-0.9.4-0.fdr.2.2

I can not update newpg via yum because it is the latest version:

[root at laptop trevor]# yum update newpg
Gathering header information file(s) from server(s)
[...]
Finding updated packages
Downloading needed headers
newpg is installed and the latest version.
No actions to take

And I can not update libksba for an undecipherable (to me) reason:

[root at laptop trevor]# yum update libksba
Gathering header information file(s) from server(s)
[...]
Finding updated packages
Downloading needed headers
Resolving dependencies
.Package newpg needs libksba.so.0, this is not available.

But I can not update ANYTHING with "yum update" anymore because every time it 
tests dependencies, I get the same error as above:

.Package newpg needs libksba.so.0, this is not available.

What can this mean? How can I solve it so that yum update works for me again?

-- 
Trevor Smith // trevor at haligonian.com