In the previous versions, I remember we had a small tooltip when hovering above the bars in the schema analyser result and we could see the percentage of documents with each type.

I tried the stable version and the beta 5 version on Windows and Linux and I could not get any tooltip.

No problems with the black tooltips in the right side of this screen though.

By the way, the UI doesn't render very well when you have 99% "string" and 1% "undefined" because you only see half of the "u" of "undefined".

ping durran@mongodb.com

Thanks and good hunt, 

Maxime.