The level 40 Berserker talent "Increases chance to score a critical
hit by 10%." seems to not do anything. When I spec into it, the value of my crit chance doesn't change.
The level 35 Berserker talent "Increases thread generated by 10%
when 'Heroic Presence' is active." contains a typo. It says "thread" instead of "threat".
EDIT#1: My druid's Servant of Nature is kind of bugged. He only has 6-7 +13 attack power. Health (527) and Armor (0+63) seem to be normal. When i switch my weapon from Redwood Shooter to Shalehorn Bow for example (switching totem works as well, so I guess it works with all kind of items) the attack power switches to 6-7 +85-95, where it should be. Still, that doesn't fix it. As soon as my Servant hits an enemy once, dealing appropriate damage (~80), his attack power bonus drops down to +13 again. When resummoning him, he spawns with normal attack power values (+85-95) and drops down to +13 again after one hit.
Here are the talents I chose (highlighted the most likely important ones):
lvl 10: bonus ap+sp from weapon
lvl 15: +15% max MP
lvl 20: +7% healing spell crit chance
lvl 25: Servant is now a treant, +sp for minions
lvl 30: +15% max MP for spirits
lvl 35: +10% max SP
lvl 40: +50% range of Remedy
lvl 45: -25% Nature's Blessing CD
lvl 50: No talent yet, cause not lvl 50
This bug doesn't occur for the bear/wolf talent. Didn't test the normal Servant of Nature, but I guess that only the treant has that problem.
It seems like the +15% max MP of spirits doesn't work properly either. One time, when I had the treant talent, my Nymph's mana hopped from 170 to 224 when choosing the +15% spirit MP talent, all the other times, even after repicking and choosing other Servant talents, it didn't change the mana of my spirits.
EDIT#2: The level 50 Druid talent "Allows to summon both Efreet and
Dryad at the same time." should say Nymph instead of Dryad, I guess.