ithacaindy: Essentially, don’t use the “Disk: Basic” or “Disk: Enhanced” settings for the cache. Or, if you do, then make sure you have Directory Indexing disabled on the site, which is generally a good idea anyway.
To disable directory indexing on a site, add Options -Indexes as the first line in the site’s .htaccess file.
IMO, the database cache isn’t particularly effective in most cases anyway, and you probably should not have it enabled. The Object Caching mode will likely be more effective. Although this depends on your specific server configuration, among other things.