Unrest Basement
 

It appears that pathing in the basement area changed during today's patch. An easy way to reproduce the problem I was experiencing is to target the spawn between the two stairs in the basement on the ground floor and, from the right hand stair (closest to bookcase), /pet attack.

My pet would run down the stairs, aggroing the mob between the stairs and the mob in the center of the room, up the left-hand stairs (aggroing a wanderer) and towards the left most upper spawn (aggroing it, as well).

In summary:
Yesterday--- /pet attack on mob between stairs would aggro mob between stairs and mob in center of basement
Today--- /pet attack on mob between stairs aggros mob between stairs, mob in center of basement, wanderer behind hidden wall, and mob in the upper left hand spawn.