When the Lichtenauer Overhau announcement comes after an attack it does the same damage as a regular attack and does not apply any (visible) conditions. I'm dual-wielding sword class weapons, in case that makes a difference. Also, this behavior has been consistent through multiple save/load sessions, though all with the same character. Since I haven't found anyone else reporting this problem in a forum search, it may be specific to my setup, or I may be missing something. What effects are other people seeing when this goes off?
I don't think you'll see the damage in the message buffer; you have to see it in the numbers floating out of the enemy. Which is not easy. It would be very nice if procs showed up as part of the attack message, e.g. "You poison the Diggle! (1 slash, 2 toxic) (+3 piercing Et Tu) (+3 piercing Vampirism Attack)"
That would explain it. I've been watching the message log, and checking the numbers floating up is made harder with the Overhau message cluttering things up. Thanks, and that is indeed an awesome idea.