http://www.hrmarketer.com/: Increase in server errors
Google detected a significant increase in the number of URLs we could not access. It is likely that your server had an internal error or was busy when attempting to process these requests.
- Check the Crawl Errors page in Webmaster Tools.
- Check your scripts and script permissions.
- Examine the log files on the server for your site for scripts or pages that might be crashing.
- Consider addressing the load on your server.