Kovid,
Big thanks for this report. I had just some time to play with it and I like the report very much.
I have some problematic books where I did some quick tests. Not only that I can open these much faster in the calibre editor (some of them take in Sigil some cups of coffee), the reports seems to be more accurate. I need some time to figure out all the differences, but what I am seeing is impressing me very much.
Something I am missing (and also in Sigil) is the information what kind of font is used for a character. I don’t know if this is something what is easy to pull from the reporting tool, but that is something what is sometimes very helpful if there is more than one character set involved. Maybe you have some when a bit spare time for this
.