I think it was last week...my site was down with a HTTP Error 500 - Internal server error. I submitted a help ticket and my site was up after a bit, but no explanation for the error as I had requested.
I now have an .htaccess file that is new and has nearly nothing in it; where as I had many lines of code in my two other ones, which are still in my cpanel and have been renamed by the tech support, also with no explanation. Those files have all the rewrite rules, robots.txt files, allows and denys, etc.
This is all that is in my .htaccess file now:
allow from all
deny from 188.8.131.52/8
deny from 184.108.40.206