最佳答案
Note: This is probably a no-brainer for experienced SVN users, but it stumped me for quite awhile...so here's hoping this will help someone like me!
After issuing svn log
from the command line, I noticed that several recent commit messages were missing. I knew that these messages were correctly saved in my repository because they were showing up in my SVN client (RapidSVN). I just couldn't figure out why they wouldn't be visible using the command line version of svn.
Answer below...