We were having an issue with one of our sites that we use this plugin on. The .htaccess file was getting corrupted. We found that Simple Firewall was causing the .htaccess file to be re-written about every minute. I reported the problem on the WordPress forum expecting to never get a response. Paul responded almost immediately, took the problem seriously and made a change to fix the issue. A new version was out the next day.

Since then the .htaccess file has not changed or been corrupted again.

We really appreciated the support received for this free plugin, better than you get on many commercial plugins.