There's a bug with skill save/loading that lets you use more points than you have. Make a save, then assimilate to gain a point. Loading the save will give you the wrong number of points, leading to bugs.
Bug. If you skip archers then go with swordsmen, and you have the nomad raid perk, forest doesn't open up instantly. you have to build a second swordsman which defeats the purpose of the perk.
There are bugs with the bonus screens that let you use more points than you have. Select a regular bonus and then put everything else into a "+" bonus. Remove the regular bonus then remove the "+" bonus. The total points will be screwed up. Use all the possible points and go back to the game screen and you'll be able to assign more points. Then it starts to get all screwed up.
If you buy a first building on the right side, like Stonehenge, it clicks whatever button is under the first choice as well. So if you click where the Max button is, you'll usually spend all your food on druids.
Two minor bugs
1. When you get to choose between two buildings on a tier, you can apply horses to the first one but not the second one.
2. You can hire a single archer/swordsman even when you have 0 food.
Here's a fun and powerful build with 4 in nomads: wagon giving horses, well receiving all horses, butcher's tent, shooting range. Insane food generation, no magic.
 "Incremental Blocks"){kind=icon}
 "Get A Little Gold"){kind=icon}
 "Idle Hamlet"){kind=icon}
 "Idle Harvest"){kind=icon}
 "NGU IDLE"){kind=icon}
 "Idle Squares 2"){kind=icon}
 "Idle Snowflakes"){kind=icon}
 "Pixels Filling Squares 3.0"){kind=icon}
 "Orbit Idle"){kind=icon}
 "Realm Revolutions"){kind=icon}
Dijon = Farmer :) That will be fixed for the next patch