I went through the Ideology trees, looking for obvious bugs and inconsistencies. Here is what I have found:

Benevolent:

The tooltip for Beacon says, that it increases Approval and Tourism on the homeworld to 100%. However, it doesn't provide a bonus to Tourism (unless that one is hidden), only a 50% bonus to Approval.

The tooltip and description for Enlightenment says, that it allows construction of the Temple of Enlightenment. However, there is no such building.

Malevolent:

The tooltip and description for Merciless says, that it unlocks the Devil's Forge improvement. However, it actually unlocks the Death Furnace. The Devil's Forge is instead unlocked by Slave Mastery in the Drengin tech tree.

The tooltip for Greed says, that it provides a 5% bonus to planetary income. The actual bonus, however, is 10%.

The description of the Intimidate trait says, that the Intimidation Center increases Approval. However, the Intimidation Center doesn't provide an Approval-bonus. Instead, it provides a bonus to Influance Growth.