First, let me say I love Calibre. Very easy to use and does everything I need from it and then some.
I would like to respectfully suggest for future upgrades, though, that the bit that converts titles to title case be slightly tweaked, since it insists on capitalizing "of", "the", "and", and similar words not normally capitalized in titles unless the first word or occurring after a separator like a colon.
I have no clue how feasible this may or may not be, just kind of throwing it out there to get whatever consideration it may or may not deserve.