Question Who or what is changing my htaccess file

[Change Maker]

Thanks Maarten. I have ignored those other two.
I've been experimenting further in that when the line is not #'d then the Website works but the forums don't work, which is in a Sub Folder.
The opposite is true when I # the line. But the two cannot work in either state at the same time. This is a real pain.
I've seen the same rewrite engine in other sites I manage from the same server, where there are no such problems, but they do not have the forums?

I guess you'll conclude the same as me?

 

[roban]

According to my experience, you can read your .htaccess file through Yoast Plugin.