Looney Tunes: The Golden Collection --- 4 DVD Set! --- Available NOW!

"I Like Mountain Music" (Harman and Ising; 1933):

CN: A short scene in which Zulu natives are seen flapping their oversized lips in tune with the music is gone.

"I Love to Singa" (Avery; 1936):

TNT: Most likely for time reasons. When this cartoon was shown on the short-lived Rudy and Gogo Show, the first time that Owl Jolson sings "To Cilia" and many of the auditions for "Jack Bunny" were removed.

"I Taw a Putty Tat" (Freleng; 1948):

CN, TBS, TNT, WB: Sylvester dressed as a maid complains, "Ev'ryday, it's da same thing, clean out the bird cage, clean out the bird cage... come on lil' birdie." He grabs from the cage what he thinks is Tweety but discovers that he has really snatched a stick of TNT which explodes in his face. This is retained in the cartoon, but edited out of it was Sylvester in blackface from the TNT blast saying a la Rochester, "Uh Oh! Better get back to the kitchen. I smell somethin' burnin'!"

"I Was a Teenage Thumb" (Jones; 1963):

ABC: With a knife, King Arthur opens a fish that his knight has caught. The King, surprised, says, "Morty, you ass! This fish is full of people!" When "I Was a Teenage Thumb" aired on ABC between 1985 and 1989, this line of dialogue was uncensored, but such was not the case when the cartoon was shown again on ABC in 1998. The "you ass" part was gone.
CN: Instead of merely removing "you ass", CN edits the King's entire line.
Nickelodeon: Same edit as on ABC in 1998.

"The Iceman Ducketh" (Monroe; 1964):

Merrie Melodies: The following two scenes were edited: 1) Daffy pulling Bugs' carrot out of his gun and being blasted by the gun; 2) Daffy tugging on the rifle that his ice statue is holding and again being bombarded by gunfire.
FOX: Gone entirely was Daffy pulling Bugs' carrot from the gun barrel. Also missing: Daffy retrieving his gun from the ice statue; there was a cut to the next scene immediately after Bugs says to Daffy, "I'll see you after the spring thaw, pal." Daffy was still inside the ice statue at the edit point. Merrie Melodies and the WB cut this scene after Daffy removes himself from the ice statue and says, "We'll see who gets the last laugh around here."
WB: Same cuts as on Merrie Melodies.

"Injun Trouble" (Clampett; 1938):

CN: During the scene wherein Injun Joe is chasing Porky with his axe, the first part of the gag where "Joe" chops a Statue of Liberty from a tree was missing. The viewer only saw Porky & Injun Joe coming down the side of the Statue.

"An Itch in Time" (Clampett; 1943):

CN: The ending has the flea lifting Elmer and his dog on a plate and singing "I Found Food Around the Corner", and a cat witnesses this and says, "Now I've seen everything!" The typical cut of the suicide happens after the cat said that.

"I've Got to Sing a Torch Song" (Palmer; 1933):

Nickelodeon: Scenes of the Chinese police and African cannibals were edited out of this cartoon's black-and-white print.