The CTD problem happens to me on a fresh install (FfH 2.041n, plus patch o) and is reproducible with the Black Tower scenario. Other scenarios just crash on load most of the time, but not always.
I have attached my Trophy.cfg (renamed to .txt to attach it, rename it back to Trophy.cfg before using). This is at the point when I first tried to open Black Tower after completion of the Radiant Guard and ran into the problem.
I tried deleting and re-installing FfH and, using this Trophy.cfg file, the bug is still reproducible by attempting to load Black Tower.
If needed I can give more detailed instructions to reproduce this bug starting from a clean BtS installation, hopefully we will see the same behavior on other computers as well and can find the cause.
I realize this discussion is more than a year old, but since apparently no fix except the 'load through WB' workaround has been found, I thought maybe the file could help reproducing the bug and fixing it.
Is it possible to turn on some kind of debug output or run FfH in a debugger of some kind to find the cause of this crash? If anyone can tell me how to do that I can try it on my computer as well and see if we can find more information.