Too many mistakes/bugs

The plugin is not usable after installation, since there are too many
usability mistakes and bugs.

For example the by-default activated overloading of the comment output, that doesn’t work together with any theme I’ve tested (incl. the standard themes) – it always looks odd. Why do you have to overwrite so much styles?

Then there are code pieces like explode('>'.__('Log in', 'social'), $link);, which causes the plugin to effectively garble the theme, because you are not using the default translation but one out of you own namespace (which differs).

http://ww.wp.xz.cn/extend/plugins/social/