Instead of single closing quotation marks (and other similar symbols), some posts show strange character strings such as â€™.
I am using W3 Total Cache, with a database collation of utf8_general_ci and a character encoding of UTF-8. The incorrect characters go away if I clear the disk cache and refresh, but they return after a little while.
I currently have the following in my wp-config.php:
define('DB_CHARSET', 'utf8'); define('DB_COLLATE', 'utf8_general_ci');
Commenting out the lines only caused more obvious encoding problems.