FYI, for anyone who might run into the same issue with the custom version of chosen that comes with tagfilter.
(full disclosure, the following is how I understand this to work, i'm NOT an expert!)
the custom version of chosen uses the browser object, which has been deprecated. This was causing errors which showed up in the console view of chrome.
to rectify this issue, I put the following code in my %dokuwikiroot%/lib/plugins/tagfilter/script/chosen/chosen.jquery.js
jQuery.browser = {};
(function () {
jQuery.browser.msie = false;
jQuery.browser.version = 0;
if (navigator.userAgent.match(/MSIE ([0-9]+)\./)) {
jQuery.browser.msie = true;
jQuery.browser.version = RegExp.$1;
}
})();
I still am looking for ways to set the header text, and use AND instead of OR for multiselects.