One of my family account members is having major issues since the patch update. Her damage spells all show "0-0" (as in zero to zero, not a shocked smiley) damage and do not cast. Her Swords, Shields and Aura appear to her to cast on her opponent.
When I am in the same circle, I can see her charm spells are interacting correctly from my point of view; however when I cast a damage spell (in our test case Tempest), to her it appeared as if it were coming at US.
In researching I noticed one other person posted something similar in the Grizzleheim/Wintertusk Forum earlier today.
I am having her get the DxDiag.txt and some screencaps so we can send in a report if needed, but I wanted to check here first, since this forum seems to get a quicker response than the 48 hours it takes for support.
