1. when you enter a building, the other buildings you have built turn black. it's a bit of an eyesore.
2. when you save and reload, any actions that your characters might be doing are reset to idle. this can be a bit frustrating when you have a large group constantly working on different things with a place for everyone.
3. when your group builds things automatically and takes building materials from the stone refinary, they should take as much as they can if they need to do so. for example, if someone is building a well that needs 5, and there are 5 building materials available, he should take all 5 (or as many fit in his inventory) to complete the project as quickly as possible