Corrected entry: When SpongeBob is going to the fridge at the outside of the Krusty Krab, when it's raining, to hide the dead man there, you can see that the sign of the Krusty Krab is at the left of the Krusty Krab, instead of being at the right of it, like it's always. This could count both as Continuity error and as Plot Hole error.
Corrected entry: In "Nasty Patty", they enter the fridge, and there's nothing in it. However, we see that in "SB-129", Squidward stays in the fridge for 2000 years, until the future, and then he returns to the past. But wouldn't SpongeBob and Krabs, when they see the fridge, see that Squidward is there, frozen?