I just upgraded to 1.3.1 and noticed quit a bit enhancements, great job!
One thing I noticed however is that TFH is fetching meta data behind the scene when working with HDFS, which is great. However, in my situation, which I don't believe it is uncommon, hdfs files are coming and go under certain directories. But when TFH is trying to fetch information for a file that just being removed, a dialog pops up stating "Loading error for object xxx_file_name" and blocks me from doing anything else. It is OK if one or two files removed. But in my situation, we got thousands of files being added/removed constantly. And I have to click ok thousands of times to remove the dialog.