Quotmarks Replacer is a plugin disables wptexturize founction that keeps all quotation marks and suspension points in half-width form. This plugin also works fine with WordPress Mu.
The plugin works fine with changes in WordPress theme.
Download the plugin here: http://wordpress.org/extend/plugins/quotmarks-replacer/
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Quotmarks Replacer 通过禁用 wptexturize 函数，解决 WordPress 自动将半角的单引号、双引号和省略号转换为全角标点的问题。使后台输入的标点格式与前台读者浏览的标点格式保持一致。并且对 WordPress Mu 有良好的支持。
使用插件优点在于换主题不用惦记着改了，省事。
插件地址：http://wordpress.org/extend/plugins/quotmarks-replacer/