Revealing mistake: As the RCV enters the gravel field with the bomb, you can see a person in shorts walking casually in the background, despite the area being sealed off.
Plot hole: During Ryder's report, as Bruce and company watch it on TV, the camera suddenly zooms in on Joker standing on a catwalk above Ryder, and none of the crew, especially not the camera man who caught the villain, makes a comment about this. They may have thought the Joker (or rather an impersonator) was perhaps a surprise gag in the show, but since this is supposed to be a serious documentary report, it is still strange that they wouldn't point it out.
Kessei! CLAMP gakuen tanteidan - S1-E1
Continuity mistake: Nokoru Imonoyama is looking at the dossier about the brother-in-law of their client. The chart showing the sorry state of his business looks different from the close-up when Nokoru puts it down - for instance, it's bi-color grey and white, when it was simply with white background before. (00:13:15)
Academy's Seven Mysteries Murder Case: File 1 - S1-E1
Other mistake: Miyuki dirties her hand with ketchup leaning against a wall; however, the white wall has no red markings. (00:04:00)
Continuity mistake: When King mentions the two brothers' "destiny", his big feline is at Young Diabolik's side, facing King and the others. Aerial shot, and the panther is at King's side facing Diabolik. (00:05:00)
Silence of the Lamborghini - S1-E18
Factual error: There is a fashion show in Rome by "Gianni Bellisimo". The correct spelling is Bellissimo.