Akismet was updated to version 2.6.0, from version 2.5.9. Changelog:
- Add ajax paging to the check for spam button to handle large volumes of comments
- Optimize javascript and add localization support
- Fix bug in link to spam comments from right now dashboard widget
- Fix bug with deleting old comments to avoid timeouts dealing with large volumes of comments
- Include X-Pingback-Forwarded-For header in outbound WordPress pingback verifications
- Add pre-check for pingbacks, to stop spam before an outbound verification request is made