the book was better

Changes, differences and plot holes:
* ages were changed from 12-13, to 16-17
* because of the age change, a plotline from the books can never be addressed.
* Annabeth was changed from a blond to a brunette.
* Grover's race was changed.
* several characters were omitted, or exchanged for other characters.

Changes, differences and plot holes:
* Ella meets Char later in life, instead of knowing him for years.
* An uncle is added in, Char's parent are uselessly killed off.
* different plot.

Changes, differences and plot holes:
* The Origin of the Marauder's map is never explained.
* Harry gets the Firebolt at the end of the movie, instead of at Christmas.
* Sir Cadogen is never introduced.
* Lupin's werewolf form is visually different.
* We never learn that Snape owes his life to Harry's father, James.
* The Marauders are never named.

Changes, differences and plot holes:
* Harry's dream takes place at the weasley's house.
* We never see the Dursley's meet Arthur weasely.
* We never see the start of Fred and George's candy business.
* We never meet Winky.
* Hermione never develops an interest in House Elf Welfare, and therefore never forms SPEW (the Society for the Protection of Elfish Welfare)
* The Whereabouts of Dobby are never given.
* Neville gives Harry the gillyweed instead of Dobby.
* There is no sphinx in the final task.

Changes, differences and plot holes:
* Harry adresses Sirius' letters to "padfoot" instead of "fluffy", with no explanation as to how he knew the old nickname.
* Colin and Dennis Creevey have been omitted, and replaced by a character named Nigel.
* Harry never recieves a two-way mirror from Sirius.
* The Trio never meet Neville or his parents at St. Mungo's. They also do not see Gilderoy Lockhart there.
* Harry never gives the "Smash Shelves" command in the department of mysteries, and there is no question mark on the prophecy next to his name.
* Ron never encounter the brains in the DOM.
* Bellatrix uses Avada Kedavra on Sirius, instead of an unnamed spell.

Changes, differences and plot holes:
* Main character changes from a blonde to a brunette.
* Her boyfriend changes from a teacher to a chef.

Changes, differences and plot holes:
* Mo is American
* Meggie appears to be 15 or 16, rather than 12.

Changes, differences and plot holes:
* Will's age is changed from 11 to 14.
* Will and his family are American
* The movie is set in modern times, while the book is set in the 1970's.

Changes, differences and plot holes:
* Eragon's age is different
* The dragon, Saphira, grows instantly.
* Galbatorix is introduced, and is more involved in the plot.
* The trip to the Varden only takes a few weeks.
* Eragon never learns to read.