Sometimes, blessing a flaming pig will not award exeprience. The pig status will go Burning > Blessed > Burning. It will then run away, just as expected and count toward the completion of the quest. However, if you manage to cast bless one more time on the now not so flaming pig, the experience will be awarded.
Oh and sometimes, namely against Kniles and Scapor, the ennemy will get a free hit against my characters while they're positioning. A bit unfair.
EDIT : Something else I came across regarding critical multiplier. At certain scoundrel levels, the multiplier would end with a 4 instead of a 5%. e.g. Scoundrel level 7 : +35%, but my effective multiplier would be 184%. At level 8 it would be 190%, as expected. It happened at an earlier level too, but I forgot to note which one.
Also, ennemies have a tendency to use battering ram on characters a level above them, fly to hit them and then get back to the ground (but only if there isn't enough room for them up there.)