This plugin verifies your installed files against a hash to see if any are missing, changed or corrupt. Takes two seconds.
Corupt WordPress and Genesis files can cause a myriad of frustrating bugs: broken permalinks, bizarre admin behavior, the dreaded white screen of death, and usually with no notice or indication of where the problem lies. This plugin identifies files in the WordPress core and the Genesis theme that are corrupt, changed, incomplete or missing by comparing them against a known hash of the latest release. This two-second sanity check is especially useful on shared hosting servers or client servers where you don't have immediate access to log files.