All movies had plot issues. This one just manages to tackle a lot of scenarios at once so it will have issues. Focusing heavy on fighting or other issues and calling it errors is questionable knowing that TDK could've ended right when Batman faced Joker at the party, kicked his ass and locked him up.
A movie only need adhere to its own internal logic. TDKR has a lot of issues that break that, many of which have been called out ad nausem.
How did Joker get the guy with bomb in stomach in jail as the same time as him? How did he get the bomb in there in the first place! You can't pack that much explosive in stomach!
I always thought that that goon was drugged and knockout before that process and it was placed in his fat layer, not his actual belly.
How did Joker avoid dying in the explosion?
He walked out of the police station prior to the explosion. I don't remember it being clear when he actually placed the phone call to detonate the bomb.
Why isn't Harvey Dent dead from the heavy third degree burn, and why isn't he in constant pain?
Dead? That's a stretch. In pain, he looked pretty morphined up in the hospital. And his face was scabbing over under the bandages.
How come no one saw that Jim Gordon isn't dead? Did they just throw his "body" in the river and he walked away?
Wat
How were the ballistics/shrapnels used to find fingerprints?
The fiction of that is shown pretty clear.
How did Tumbler become batpod?
It was designed that way or modified in post by Bruce.
Couldn't the tumblers in TDKR become batpods?
Seeing as how each of those Tumblers were varying prototypes from around the world, maybe? But they were never used so it's irrelevant.
How does the whole autopilot in Tumbler work? Where did he crash from?!
Google has an autopilot car right now. Not science fiction.
Batman jumping on a moving van?! IMPOSSIBLE! That is risking injury and getting run over by the van! Jumping on the windshield shouldn't bring the van to complete stop!
I have no idea how re-enforced the Bat suit is and neither do you.
How did Bruce know that the wall in China will explode right when he captures Lau?
The explosives had a very visible fucking timer on them!
Infact, how did he even know Lau was there to begin with in that floor?
Sonar. You answer your own question below. Movie adhered to it's own internal logic.
Where was the plane waiting?! How did it get there so quickly?!
Bruce was well aware of what time he had to get Lau out and it was more than obvious to this viewer that the plane was in route the entire time. It even takes a few seconds after the wall falls away where he is in a standoff with Lau's men.
Sonar? Fuck that!
Gotham-wide Sonar? FUCK THAT!
Adheres to the internal logic of the film. Doesn't cheat.
Pencil-trick killing the guy? C'mon!
Through the eye, sure.
How long was that boat in the ocean?! I mean trip to China must be long, wouldn't it? Couldn't then Russian cuties said anything about Wayne going away?
Who knows what they arrangements were, remember they were gone for a week, on his dime. Wayne could have explained away that he needed to return to Gotham for billionaire dealings and shit.
Please do try.