Mark Allan has released ClamXav 2.3, which updates the free virus-checking software to the current 0.97.5 release of the open-source ClamAV antivirus engine. It has also been signed with a Developer ID that’s used by OS X 10.8 Mountain Lion’s Gatekeeper security feature. While not implemented in this version, the new release does roll in support for future sandboxing. Additionally, ClamXav 2.3 brings select all and copy functions to the Infected List, reworks ClamXav Sentry to keep its RAM usage at a lower and more constant level, adds support for system-wide preferences, adds Italian localization, and makes modifications to the French localization.
A few days after the release of version 2.3, ClamXav was updated to version 2.3.1 with a fix for a bug that prevented the operation of scheduled scans as well as a temporary fix for a ClamXav Sentry bug that scanned folders in their entirety (rather than just new files added to a watched folder). Allan notes that ClamXav users still running 10.4 Tiger should not download this update, but instead download version 2.2.1 and turn off the application update checking preference. (Free from Allan’s Web site or from the Mac App Store (not yet updated), 16.5 MB)
If you follow your own link (in the article) to the Mac App Store you will see that the version it takes you to is not marked 2.3.1. The version it shows me is 2.2.4 and I don't believe that it supports Sentry.
Gah, should have caught that and mentioned it. Or perhaps we should just stop linking to the Mac App Store because it's seldom up to date.