Looks like something has been broken in Explorer functionality recently - when I click on the looking glass, I get these exceptions:
```
DOMException: Failed to execute 'querySelectorAll' on 'Element': '*,:x' is not a valid selector.
at https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:10779
at lt (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:7006)
at rt.setDocument (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:10313)
at Function.rt.contains (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:12515)
at vt (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:38057)
at Function.L.parseHTML (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:81904)
at e.handleExploreItem (https://query.wikidata.org/js/wdqs.min.156ce14a81d56066d505.js:1:79968)
```
```
DOMException: Failed to execute 'matches' on 'Element': '[s!='']:x' is not a valid selector.
at https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:11002
at lt (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:7006)
at rt.setDocument (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:10951)
at Function.rt.contains (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:12515)
at vt (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:38057)
at Function.L.parseHTML (https://query.wikidata.org/js/vendor.min.bf890eacfdcb0caf54c9.js:1:81904)
at e.handleExploreItem (https://query.wikidata.org/js/wdqs.min.156ce14a81d56066d505.js:1:79968)
```
```
Uncaught TypeError: l(...).dialog is not a function
at e.handleExploreItem (wdqs.min.156ce14a81d56066d505.js:1)
```
This is in Chrome on OS X.