Description of problem:
Forced RPM transaction skips dependency check for installed packages with the 
same version.

Version-Release number of selected component (if applicable):
# rpm -q fedora-release rpm
fedora-release-4-2
rpm-4.4.1-21

How reproducible:
Every time.

Steps to Reproduce:
1. Create two packages 'first' and 'second' with version 1.0 and release 1

2. Package 'second' provides 'second-special' and package 'first' requires it.

3. Build packages and install them:
# rpmbuild -bb first.spec && rpmbuild -bb second.spec

4. Install packages:
# cd /usr/src/redhat/RPMS/noarch/ ; rpm -Uhv first-1.0-1.noarch.rpm second-1.0-
1.noarch.rpm ; cd -

5. Comment out provides and requires for 'second-special' in both package.

6. Increase 'second' package release to 2. Do NOT increase release for 
package 'first'.

7. Re-build packages:
# rpmbuild -bb first.spec && rpmbuild -bb second.spec

8. Try to upgrade them forcedly:
[root@colinux ~]# cd /usr/src/redhat/RPMS/noarch/ ; rpm -Uhv first-1.0-
1.noarch.rpm second-1.0-2.noarch.rpm --force; cd -

Actual results:
error: Failed dependencies:
        second-special is needed by (installed) first-1.0-1.noarch

Expected results:
The upgrade should be ok because I replace 'first' package forcedly in this 
transaction.