Prior to updating from 1.19c to 1.19i:

Deleted files associated to previous installed version (contents of \Effects, \Items, \Mods\Gfx, \Mods\Data, \Saves, \Units, \ProgramData\Stardock\Elemental - War of Magic\screens, etc.).
Retained previous Prefs.ini.

Installed, launched and started a new game for Small world, Extreme difficulty.
Created a new sovereign.
Selected maximum opponents, Extreme difficulty.

Turn 1: Immediately founded kingdom, assigned sovereign to the city, renamed city, and moved sovereign out to begin exploring. Found metal and selected another notable location two moves out of range. Ended turn.

Turn 2: With sovereign selected, right-clicked on notable location listed above. Sovereign inexplicably moved back to settlement and the game crashed with DX Error: Invalid call.

No available saved game or crash files in \ProgramData. Attaching debug.err at http://dl.dropbox.com/u/16442254/EWOM_119i/debug.err