I know its not released but my jaw dropped when I read this

Updating to 1.7 or higher

From Roundcube 1.7 you must configure your web server to use the public_html folder as the document root.



ummm, what the actual fsck? public_htrml ???????? who the hell uses public_html on webmail servers, or any hosting server for that matter, I've not seen that directory used since the 90s, please tell us that is a placeholder, or some left over from version 0.01a