Two more bugs that affect gameplay:

1) When I researched Intensive Farming (a.k.a. Xeno Farm II) and completed an Intensive Farm on the same turn, my food did not go up. We're talking an Intensive Farm, on a 300% Farm tile, and my food production was 6mt. Then when I decommissioned the farm (to start over), my food AND population went to -18 billion!!! I reloaded the save game and it went away.

2) If you have High Espionage on a guy and double-click on one of his planets, you can Nullify your own agents. Selecting a tile you're currently spying on should give you the option to Remove the agent--not Nullify. Fortunately, you can work around it by going to the Espionage screen instead.

While we're on the subject, a minor UI tweak: if you have no available agents, the Spy button on planets dims out, even though you have spies on that planet. You should be able to Spy on the planet if you have spies on the planet. The workaround, again, is to go to the Espionage screen and remove an agent. Then you can Spy on anyone you want.