PHP errors

Hi there! Great plugin! I did upgrade and am now finding this error in the logs. Any ideas?

Missing argument 3 for UpdraftPlus::prune_retained_backups(), called in /home/xxxxxx/public_html/hg-blog/wp-content/plugins/updraftplus/updraftplus.php on line 500 and defined in /home/xxxxxx/public_html/hg-blog/wp-content/plugins/updraftplus/updraftplus.php on line 506

Note, it’s appearing across multiple blog installs but the plug-in seems to be working ok.

Any help with this is much appreciated!! 🙂

http://wordpress.org/extend/plugins/updraftplus/