There are at least two revisions of Twilight Princess for the Wii, and possibly three.
The first was the original release with the infamous error in the cave which could render your game impossible to complete.
Nintendo acknowledged this error and had a trade-in program to swap for a bug-fixed version of the disc.
There may be a third revision which is just the latest production run. It fixes another game ending error related to a bridge in the game. This error may have been fixed in the trade-in program version, but I do not know.
My question: is there a way, by looking at the disc, to know if you have the bug fixed version?