I tried to remove the dotted lines that are found above the header and by the sidebar, but I cant seem to do it.

This is what i tried:

removing line 33 from main.css:

#page .divider{padding-top: 12px; background: url(images/nav_horizontal_divider.gif) no-repeat top; overflow:hidden; height:1px; clear:both; width:100%; }

&

and deleting the images from (concrete/themes/default/images)
nav_sidebar_left_bg.gif
nav_sidebar_right_bg.gif
and nav_horizontal_divider.gif


I also deleted the cache. But the dotted lines are still there...

Thanks in advance