Not really a bug, rather a useability issue.
THIS:
INSERT INTO `sys_objects_social_sharing` (`object`, `content`, `order`, `active`) VALUES
('facebook', '<iframe src="//www.facebook.com/plugins/like.php?href={url_encoded}&send=false&layout=button_count&width=450&show_faces=false&action=like&colorscheme=light&font&height=21&locale={locale}" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:100%; height:21px;" allowTransparency="true"></iframe>', 1, 1),
('googleplus', '<div style="height:21px;">\r\n<div class="g-plusone" data-size="medium" data-href="{url}"></div>\r\n<script type="text/javascript">\r\n window.___gcfg = {lang: ''{lang}''};\r\n (function() {\r\n var po = document.createElement(''script''); po.type = ''text/javascript''; po.async = true;\r\n po.src = ''https://apis.google.com/js/plusone.js'';\r\n var s = document.getElementsByTagName(''script'')[0]; s.parentNode.insertBefore(po, s);\r\n })();\r\n</script>\r\n</div>', 2, 1),
('twitter', '<iframe allowtransparency="true" frameborder="0" scrolling="no" src="//platform.twitter.com/widgets/tweet_button.html?url={url_encoded}&text={title_encoded}&size=medium&count=horizontal&lang={lang}" style="width:100%;height:21px;"></iframe>', 3, 1),
('pinterest', '<a href="http://pinterest.com/pin/create/button/?url={url_encoded}&media={img_url_encoded}&description={title_encoded}" class="pin-it-button" count-layout="horizontal"><img border="0" src="//assets.pinterest.com/images/PinExt.png" title="Pin It" /></a>\r\n\r\n<script type="text/javascript" src="//assets.pinterest.com/js/pinit.js"></script>', 4, 1);
This makes cute little buttons on your PC browser, but on an iPhone they are microscopic. Because of the iframe content, and remote styling, it's impossible to scale these tiny little buttons upwards, so that they are visible and useable on a mobile device. The CSS Transform:scale() is of no use because it also scales padding, margins, and positions, and things basically go nuts.
Can these buttons be changed out with some jQuery version like this one: http://carrot.github.io/share-button/
so that mobile friendly templates can display usable sharing buttons?