Continuity mistake: 320 "Crossroads, Pt. 2" and 401 "He That Believeth in Me": When Starbuck returns in the season 3 finale, the side of her Viper has no nameplate on it. However, during the season 4 premiere, the nameplate with "Kara Thrace 'Starbuck'" has returned, though only a moment later.
Continuity mistake: Season 3 Episode 8: Hero. When Adama is trying to resign the President hands him a copy of the certificate she wants to present to him. The pen that was in the holder a few seconds ago has been removed to allow her to hand it to him without the pen in the way. (00:39:00)
Revealing mistake: After Dualla shoots herself, Gaeta hobbles back into the room. While the effects people made sure his real lower leg was erased from view behind his upper leg, they forgot to remove the shadow of the lower leg being cast upon the steel floor. The shot then changes away and returns to find the shadow has now been fixed the second time we see it.