Up to ADOM 1.2.0p22 monsters going berserk got bumped quite a bit:
-6 DV
+6 to hit
+6 to damage
double attacks

Starting with p23 this will be more gradual:
-6 DV
+3 to +6 to hit depending on base level
+3 to +6 damage depending on base level
more attacks (minimum of one extra attack, maximum of three or double attacks whichever is less), again depending on minimum level

This should prevent monsters from becoming too much of a death machine in response to http://www.adom.de/forums/showthread...sue-1-2-0-p22)