When The Doctor takes out his Sonic Screwdriver to disable the audio and video aboard the tour bus it's shown fully activated, yet in the next shot which shows Sky watching him, it's still in the process of activating.
The rippled light pattern in the swimming pool does not move, indicating a matte painting.
When Professor Hobbes is explaining the planet Midnight to the people on the shuttle, a pie chart is seen behind him, showing the minerals that Midnight is made up off. In this pie chart the mineral iron is shown twice, both at 14 % and then again at a lower percentage.
When the doors are sliding down at the beginning of the Crusader 50 trip, the wall panels can clearly be seen shaking.
When The Doctor is talking to Donna just before boarding the Crusader bus, a green screen can be seen behind him.