Morte doesn't bite anymore

[amlethus]

Something strange happens to Morte - he doesn't hit anymore.

He still criticals from time to time, but no normal hit, not even against lowly street thugs (also, there are no "Weapon ineffective" messages, even against enemies for which this should happen)

It happens between Baator and Curst gone. Using old save games (and Ignus as "Bite Test"), it seems to happen when resting in Fjuhll's (sp?) lair.

He's lvl 10 or 11 (ETW0 11, 2 attacks, next level will give ETW0 10 and 3 atacks).

Things I've already tried: save exit restore, using his original teeth, leveling him up. nothing helped.

There are still things i can try - but I feel it's hopeless.
Is this a known bug? Any ideas?

[edit]
It seems to be triggered when I rest at all. Not resting at Fjuhlls, going directly to Curst Gone, the same happens.[/edit]