Page in URL specify the follow in CCS: border: thin solid; border-right: none; border-radius: 0.3em 0.4em; border-top-left-radius: 2em 1.5em; border-bottom-left-radius: 0; border-top-right-radius: 0; border-bottom-right-radius: 0; But top left border is not rounded.
WebKitGtk screenshot: https://bugs.webkit.org/attachment.cgi?id=25810&action=view Reference PDF screenshot: https://bugs.webkit.org/attachment.cgi?id=25811&action=view 2 columns issue yet reported in bug #22706
WebKit does not support an unprefixed version of border-radius due to the standard still being in flux. If the page were to use -webkit-border-radius it would render as expected.