This link goes to a site that announces the publication of a critical edition of the Koran. A critical edition of a work is an edition that gathers all the significant textual variants so that a reader can easily see how the text has been changed.
Critical editions of Hebrew and Christian scripture are commonplace. This, however, will be the first critical edition of the Koran ever made. Called the Corpus Corianicum, it brings together the known changes made in the first six hundred years of the Koran. Since many Muslims hold that the current text of the Koran is identical with a text found in heaven, this news of variant readings will cause some issues, so to speak.
I had known that this was coming, but not the state of the effort. I understand that they’re working on Suras 19 and 20 and that the whole project will probably take another decade and a half to complete. I wish them luck and, more importantly, safety in their efforts.