Extreme slow-down in any battle where either party has a berserker blade; slow down is ~10 secs, after which the game either crashes or jitters for a bit before resolving the round of combat. Slow down is averted if initial attack is dodged, but time spent in limbo increases exponentially with concurrent strikes.
Link to debug.err is http://pastebin.com/wNixwb1H ; error is reproducible with save game.
[EDIT] Using current beta release version 0.86
