I used yumex to update SL7 production to current SL7production release.  
The update failed with the following diagnostics:

Dependency Resolution Errors:

Package: libgpod-0.8.3-14.el7.x86_64 (@epel)
     Requires: libimobiledevice.so.4()(64bit)
     Removing: libimobiledevice-1.1.5-6.el7.x86_64 (@anaconda)
         libimobiledevice.so.4()(64bit)
     Updated By: libimobiledevice-1.2.0-1.el7.x86_64 (sl-security)
        ~libimobiledevice.so.6()(64bit)Package: 
libgpod-0.8.3-14.el7.x86_64 (@epel)
     Requires: libusbmuxd.so.2()(64bit)
     Removing: usbmuxd-1.0.8-11.el7.x86_64 (@anaconda)
         libusbmuxd.so.2()(64bit)
     Obsoleted By: usbmuxd-1.1.0-1.el7.x86_64 (sl-security)
         Not found
     Updated By: usbmuxd-1.1.0-1.el7.x86_64 (sl-security)
         Not foundPackage: libgpod-0.8.3-14.el7.x86_64 (@epel)
     Requires: libplist.so.1()(64bit)
     Removing: libplist-1.10-4.el7.x86_64 (@anaconda)
         libplist.so.1()(64bit)
     Updated By: libplist-1.12-3.el7.x86_64 (sl-security)
        ~libplist.so.3()(64bit)

Where does one find the "Not found" packages, and/or what changes need 
to be made to configuration files (e.g., simply not updating which 
packages from the yumex list)?  I understand that epel is not part of 
the FNAL SL base, but I know that persons with epel knowledge do read 
this list.  sl-security should be an SL issue; it appears: Obsoleted By: 
usbmuxd-1.1.0-1.el7.x86_64 (sl-security)
         Not found

Yasha Karant