Description of problem:
Yum update suggested updates to three packages c.3 days ago: xiphos, enca and sword. When accepting update, a dependency problem was immediately reported.


How reproducible:
On my Centos 7 system with epel 7 enabled by default.
Epel-testing not enabled by default or otherwise.
Priorities and protectbase plugins enabled by default; Cent base and updates priority=1;  epel priority=5.
sudo yum update
Accepting proposed updates;  xiphos-gtk3, enca (used by smplayer) and sword (installed by xiphos-gtk3) were previously installed.


Version-Release number of selected component (if applicable):
4.0.4-3


Steps to Reproduce:
1.  sudo yum update
2.  Accepting updates for all packages:  xiphos-gtk3, enca and sword.


Actual results:
The dependency problem report then was similar to the one I obtained yesterday:

Resolving Dependencies
--> Running transaction check
---> Package enca.x86_64 0:1.16-1.el7 will be updated
---> Package enca.x86_64 0:1.18-1.el7 will be an update
---> Package sword.x86_64 0:1.7.3-9.el7 will be updated
--> Processing Dependency: libsword-1.7.3.so()(64bit) for package: xiphos-gtk3-4.0.4-3.el7.x86_64
---> Package sword.x86_64 0:1.7.4-6.el7 will be an update
---> Package xiphos-common.x86_64 0:4.0.3-1.el7 will be updated
---> Package xiphos-common.x86_64 0:4.0.4-3.el7 will be an update
---> Package xiphos-gtk3.x86_64 0:4.0.3-1.el7 will be updated
---> Package xiphos-gtk3.x86_64 0:4.0.4-3.el7 will be an update
--> Processing Dependency: libsword-1.7.3.so()(64bit) for package: xiphos-gtk3-4.0.4-3.el7.x86_64
--> Finished Dependency Resolution
Error: Package: xiphos-gtk3-4.0.4-3.el7.x86_64 (epel)
Requires: libsword-1.7.3.so()(64bit)
Removing: sword-1.7.3-9.el7.x86_64 (@epel)
libsword-1.7.3.so()(64bit)
Updated By: sword-1.7.4-6.el7.x86_64 (epel)
Not found
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest


Expected results:
System fully updated.


Additional info:
Having uninstalled xiphos-gtk3 as a first step to attempt to fully update the system yesterday, I was then able to only update enca. 

When attempting to reinstall xiphos:

Resolving Dependencies
--> Running transaction check
---> Package xiphos-gtk3.x86_64 0:4.0.4-3.el7 will be installed
--> Processing Dependency: libsword-1.7.3.so()(64bit) for package: xiphos-gtk3-4.0.4-3.el7.x86_64
--> Finished Dependency Resolution
Error: Package: xiphos-gtk3-4.0.4-3.el7.x86_64 (epel)
Requires: libsword-1.7.3.so()(64bit)

The following was to no avail:
yum clean all
yum check
yum erase apf #but found that no apf installed
yum upgrade

If my observation is correct, I believe I noticed that either enca or sword installed a different version of libsword with the update: libsword-1.7.4.so.