Seems there is a bug in the latest WordPress check for gzip support which breaks visual editing. I’m not sure which condition below is causing the confusion
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// Check if it supports gzip if (isset($_SERVER['HTTP_ACCEPT_ENCODING'])) $encodings = explode(',', strtolower(preg_replace("/\s+/", "", $_SERVER['HTTP_ACCEPT_ENCODING']))); if ((in_array('gzip', $encodings) || in_array('x-gzip', $encodings) || isset($_SERVER['---------------'])) && function_exisits('ob_gzhandler') && !ini_get('zlib.output_compression') && ini_get('output_handler') != 'ob_gzhandler') { $enc = in_array('x-gzip', $encodings) ? "x-gzip" : "gzip"; //$supportsGzip = true; $supportsGzip = false; } |
but if you modify the $supportsGzip variable to always return false as above, the problem goes away.