Avoid a new issue which caused errors when showing/hiding the popup in 9.0.5 (had to remove some normal API calls here, so there might be subtle issues with the mouse working on a hidden-in-combat popup until this is resolved on Blizzard's end)
Popups have been rewritten!
They're now a stack, rather than a new one immediately replacing the current popup. (If you prefer the old behavior, you can set the stack size to 1 in the options and it'll be about the same.)
They should overlap less windows now.
Don't play multiple sounds at once. This was particularly bad for rares like the Beasts of Bastion, which simultaneously played the announcement four times, making it way too loud.
Trim the final awwwk off of Ikiss' loot announcement
Make help tooltips more compact in general
Add mobs that trigger via the yell for Sire Ladinas
Ability to toggle the map overlay per-zone by shift-clicking on the broker icon on the world map