Greetings, reporting from WP 4.6.1 & autoptimize 2.1.0 operating in tandem with WP super cache.
/* <![CDATA[ */
var google_conversion_id = 000000000;
var google_conversion_language = "en";
var google_conversion_format = "3";
var google_conversion_color = "ffffff";
var google_conversion_label = "AVCDEFGHIJ25LMN";
var google_remarketing_only = false;
/* ]]> */
The issue effects Autoptimize's own variable autoptimize_ajax_object (Warning about cache might not have been purged successfully inserted into html source)
As well as effecting Disqus comment system variable countVars which contains disqusShortname
While most browsers manage work without the CDATA information Google has stated the following: "While most browsers can properly render the AdWords Remarketing snippet in the absence of CDATA comments, other browsers will fail to properly execute the script. This will result in conversions under-reporting."
Cheers and have a nice day.
while this is true, I consider this very low priority; I don't know of any browser that needs the CDATA. If you consider this important you'll have to disable HTML optimization (which is not that important anyway).