Where Krusty re-unites with his father, Homer is wearing a long-sleeved shirt in one frame and then a couple of seconds later he is wearing his usual short white sleeved shirt whilst at the dinner table.
When Lisa is telling Homer that Krusty is speaking Hebrew, Homer only has a glass of milk to his right, and when the angle changes, Homer suddenly also has a large wine glass full of red wine which was not previously there. A few seconds later the angle changes again and the wine glass has switches side of the table and is now empty. Also, the large win glass of red wine Krusty had, is gone (which was visibly empty at the start of dinner).
Young Krusty's brown face hair goes from brown, to yellow, to brown again while 's on stage and discovered by his father after getting squirted with water.
Krusty is illiterate; how is he writing down an address?