Description of problem:
yum gives the following error, which is a huge problem, as it blocks every other
package from being updated, as it can't resolve the problem of its own.

~# yum update 
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages in global exclude list
Finished
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package tcsh.i386 0:6.14-14 set to be updated
---> Package tk.i386 1:8.4.13-4.fc7 set to be updated
---> Package tcl.i386 1:8.4.13-10.fc7 set to be updated
---> Package gutenprint.i386 0:5.0.0-5.fc7 set to be updated
--> Running transaction check
--> Processing Dependency: libtk8.5.so for package: R
--> Processing Dependency: libtcl8.5.so for package: R
--> Finished Dependency Resolution
Error: Missing Dependency: libtk8.5.so is needed by package R
Error: Missing Dependency: libtcl8.5.so is needed by package R
~#