The drop problem has been fixed. The explanation is that about 50% of all monsters generated in the SMC are flagged to not drop anything. This conflicted with the special drops defined for some monsters. Boss monsters now are exempted from the 'no drop' rule.
Regarding Rakki: He probably was magically too weak to be able to affect most PCs (except for those with a Mana score of less than 6 or those heavily doomed, unlucky, ...). I have adjusted this, too.