Hello there, Sharlyn from Moonsea
I recently updated our module to 3.4 RC1a, just this morning.

I encountered a few problems.

Wiped database, precached the 2das with mysql, installed haks, tlk, compiled my module with the new PRC includes - there's still the error where the compiler has no idea what a constant with the value "!!0" is but that was in old versions and I correct it each time. Added my own custom includes as always. Everything compiled fine.

The mod works fine, although  some PRC spellcasters (such as Archivist and Favored Souls) had to rebuild to fix their spellbook, which found itself replaced with various spells and feats, at a certain level.

However, it appears that

1) Warblade maneuvers and stances are no longer doing anything - have not tested other ToB classes so far.

2) Most importantly, base NWN caster classes: Sorcerers and Wizards for what we've tested - are no longer able to summon their familiar. It says "Summoned creature" and then.. nothing happens.

I tested an Ultimate Ranger which was able to summon their Animal Companion fine.

I'm a bit at loss here. Any ideas?