Newest problem ... since several have suggested updating my system would solve some issues, I tried it. "yum update" goes through, identifies all the packages that need updating (I assume--I didn't go through and manually verify), downloads all the packages (verified they're in /var/cache/yum/updates-released/packages), and then happily exits. But did it update anything? Nope. "yum check-updates" still lists everything that needed updating. Am I supposed to manually go into the directory and run "rpm -Uvh *"? I thought yum was supposed to handle all that?