Steps to reproduce the issue

goto the backend and navigate to system > configuration. You will see the tab "site" activated. Move your mouse over the item "Use URL Rewriting"

Expected result

... Apache users only!
Rename htaccess.txt to .htaccess before activating and consider to uncomment the line '# RewriteBase /". ...

Actual result

... Apache users only!
Rename htaccess.txt to .htaccess before activating. ...

System information (as much as possible)

You will find the string in languages/en_GB/en-GB.com_config.ini at the tag "COM_CONFIG_FIELD_SEF_REWRITE_DESC"

Additional comments

From my knowledge this step must be done anyway, why not help users ;-). Don't know if it would be to long to note additionally, that one has to add the subdir in the case, that the site is to be called in a subdir. i.e "http://mysite.com/subdir/index.php"

Don't know how the info is to be spread to the other language teams ;-)