this question is not a joke. there are several reason behind it. let me put it below:
prophet has 4 deciples whom he taught quran himself personally. these 4 deciples are:
1. abdullah ibn masud
2. salim, the freed slave of abu hudaifa
3.ubayy b. kaab
4.muadh bin jabal
(Sahih Bukhari, Volume 5, Book 58, Number 150). [search on the referenced site to find the number "150" if you want to verify the written literature].
I heard the Prophet saying, "Learn the recitation of Qur'an from four persons: (1)Abdullah Ibn Mas'ud, (2)Salim (who was killed in the 633 CE battle), the freed slave of Abu Hudhaifa, (3)Ubayy B. Ka'ab and (4)Muadh bin Jabal."
each of this 4 men has his personal version of quran. after the prophet died in 632 CE, there was a great war organized by caliph othman. there he saw the warriors recited different quran; actually the 4 version of quraan. so he ordered zayd to write an official quraan.
The 2nd most trusted Hadith is called Sahih Bukhari. In Volume 6, Book 61, Number 510, the story about Muslim soldiers arguing about different versions of the Qur’an reads as follows: [search on the referenced site to find the number "510" if you want to verify the written literature].
"Hudhaifa was afraid of the different recitations of the Qur'an, so he asked 'Uthman, "O chief of the Believers! Save this nation before they differ about the Qur’an as Jews and the Christians did before."
In response to the request, the Caliph Uthman sent a message to Hafsah since she had the most important original manuscript sheets collected about 634 CE. We find written:
"Send us the manuscripts of the Qur'an so that we may compile the Qur'anic materials in perfect copies and return the manuscripts to you." Hafsah sent copies to Uthman.
Caliph Uthman had men who knew the Qur’an to assemble it again. We find written:
Uthman then ordered four men to rewrite the manuscripts in perfect copies. After this had been done, the Hafsah codex was returned to her. "Uthman returned the original manuscripts to Hafsah."
Having obtained this new version, Uthman ordered all other Qur’ans to be destroyed by fire. We find written:
Uthman sent to every Muslim province one copy of what they had copied, and ordered that all the other Qur'anic materials, whether written in fragmentary manuscripts or whole copies, be burnt.
after the official qurraan was written and all other quraans are burned by the order of othmaan, people express grivences in the following way:
1] Let’s begin with Mas’ud, who was asked to burn his personal version of the Qur’an.
"How can you order me to recite the reading of Zaid, when I recited from the very mouth of the Prophet some seventy Surahs?" "Am I," asks Abdullah, "to abandon what I acquired from the very lips of the Prophet?" (Masahif" by Ibn abi Dawood, 824-897 AD, pp. 12, 14).
the question is: Would Mas’ud accept the Qur’an of today as being pure since he refused to destroy his unique version?
It is important to ask, "Why did Mas’ud refuse to give in and destroy his version of the Qur’an?" Mas'ud was a close companion and personal servant of Muhammad.Mas'ud would have had confidence that he was qualified to create his unique version of the Qur'an.
2] lets consider the very original manuscript of quraan called hafsa codex which hafsa, wife of muhammad kept with her till her death. hafsa did not want to burn this original version. it was burnt after she died. question is why hafsa did not want to burn it?
there are differences between official quraan and quraan of these 4 people:
a] the Qur'an version created by Mas'ud did not have chapters 1, 113, and 114 that are in the "official" Qur'an of today. Is the Qur’an truly pure as believed by Muslims today?
b] Scholars have found that Ubayy's version differed from the "official" Qur'an with two additional chapters (entitled: Surat Al-Khal and Surat Al-Afd). Since Ubayy was taught the Qur'an by the prophet Muhammad, why doesn't the "official" Qur'an contain the two additional chapters?
all these things shows that drastic changes have occurred in official quraan. now it is important to ask : is the quraan pure?
it is the same official quraan compiled by zayd on the order of uthman we are reading today. it is important to ask : is it pure?