The Chaos Hierophant bug

[Rabenrecht]

So, I stumbled upon the exploded powder mill and, not knowing better, talked to the ghosts dwelling there.
I was quite confused about what he had to say - and even more confused that the other ghost in the room was seemingly a duplicate.

Now a bit later I coincidently found out that this is indeed a bug and even a "game breaking" one (called so in the aiera wiki).
Is this true? Is my game state doomed for talking with this ghost?
Or is the worst effect here that I was spoiled a bit about the events to come?

I have a save game before this incident, but I would rather continue with my current game, if possible.

[Malignant Manor]

I think you can just set global flag 555 to false in the cheat menu.

F2->f->555->u

Cheats must be enabled in the gameplay menu if F2 doesn't bring up a menu.

Edit: This bug is one of many fixed in the SI Fixes mod

[Rabenrecht]

Yeah, I've updated my exult version to the newest snapshot and installed the SI fix mod (its good that all that is save-game friendly).
Honestly, if 1.50x is the most supported version, why is 1.49 proclaimed as the "standard" version?
This is a bit confusing for new users like me.

[Dominus]

1.49rc1 is the latest release.
1.5x is built straight from source code.
See http://exult.info/faq.php#whatis_snapshot