It's been very well known that the last Harry Potter book will be released at the same time as the movie. You may or may not be a fan and that doesn't bother me. However, after stemming through some Harry Potter forums, fansites, and various other places is has been well know that there were sections to the novel that was leaked.
One man, David Thorne, of Hatfield, England has managed (among a few choice others) to get an early copy of the book. He created a website dedicated to the spoilers with pictures of the book and pages where the spoilers were at. However, the site has since been shut down and I cannot find ANYWHERE that has pictures of the pages. The website was http://thehpspoiler.dav.org/ however you wont find anything at all there.
However, I did manage to save every spoiler in a text based form. I can't really provide anymore proof beyond what I can tell you above and I know that a lot of you are going to not believe me, but I feel like doing this topic anyway.
Don't read beyond this point if you don't want the book ruined for you:
-Hogwarts is barely able to be reopened with Prof. McGonagall as the acting headmaster. However, the halls feel very empty as many wizard and muggle parents are afraid to have their children enrolled in the dangerous school. Harry Potter does not return so the story is about him and what his friends are doing at the school.
-Ginny Weasley begins dating again much to the anger and frustration of Ron and Hermione who think she is betraying Harry.
-There is a rough scene in the book that sort of implies that Ron and Hermione have had sex during the summer however it's been revealed that it doesn't go beyond just how awkward they act around each other a little while after school starts.
-Voldemort supporter's attacks have increased over the years to the point where Muggles are becoming very suspicious about the attacks.
-All and any Quiddich has been banned for the saftey of the students. However, there are secret practices going on through the night.
-Defense against Dark Arts is heavily needed with McGonagall herself teaching it.
-It turns out that R.A.B is Regulus Arcturus Black.
-Harry searches out and finds all of the Horcuxes and destroys them weakining Voldemort. However, there is still one left that has not been destroyed.
-It is revealed that Snape did not want to kill Dumbledore, but knew what he had to do. Harry battles with him, but loses horribly. Snape decides to teach Harry if he is ever really going to kill the Dark Lord whilst playing his part. He is later killed when Voldemort, all this time, knew that Snape was a double spy.
-It is revealed at last that in the final desperation before Voldemort was destroyed the first time that he put the other bit of his soul in Harry Potter's scar. Harry Potter is the last and final Horcrux. Harry, thinking he has the upper hand, tells Voldemort that he cannot kill him because he is the final horcrux. However, Voldemort taunts him revealing another trophy he has and says, "I can afford to lose one more," before engaging in a wizards battle with Harry.
-Ron, Hermione, Ginny, and several others are fighting the dark wizards. Ron gets struck by an Avada Kedavra spell and is killed in the process.
-In the final battle Voldemort gets the upper hand and begins to slowly torture Harry with various spells. Draco Malfoy finally seeing what the dark side really is like hits Voldemort with a weak spell. Harry, finally free, his Voldemort with a forbidden spell killing him. His scar fades away and Voldemort melts into dust and smoke.
-Harry attends Ron's funeral comforting a weeping Ginny and Hermione as he decides to live his life to the fullest with his friends. He would always remember them and all the good times they have. He is celebrated as the one who destroyed Voldemort, but cannot live with such fame like that. He decides to go off on is own for a while. Not before telling Ginny he will come back for her. It hints that he will come back later to finish his last year at Hogworts.