If anyone looks up the history of Islam and they also have a look at the oldest Manuscripts, then they will see the the original Quranic Arabic was written with out diacritical marks, which means that the words can be pronounced in various different ways, depending on what the reader decides that the context is. It seems as if it is this flexibility in interpretation, that has caused various readings of the Quran to appear, which will even have different Arabic words in them. If the supposed Uthman had used the Southern Arabic script of the people from Yemen, then they would have been able to avoid this problem, but it seems as if Islam was originally invented in the Northern Iraq region, where they were still using an under-developed Arabic script, which did not have the diacritical marks and this seems to have lead to the current Qiraat problem that the Muslims now have.