Islamic Law and Ijtihad
( http://www.ahlussunnah.net/omca/HakimMurad_2205_part1a.MP3 - - Part 2 ) ( http://www.ahlussunnah.net/omca/HakimMurad_2205_Q&A.MP3 - by Shaykh Abdal Hakim Murad

QUOTE:

The first track states that it is unlawful for a person to give a fatwa based upon a hadith printed in a book, as agreed upon by classical scholars. If you look at the Sahih al-Bukhari , even the best printed version of, and compare it to previous authenticated editions of the text, there are some differences in the riwayat of some the hadith, and the same goes for Sahih Muslim. As a result, a person who has learned hadith on their own to the extent that they can make takhrij, may be making takhrij on a riwaya that is not accepted by the actual muhadditheen as being the authentic riwaya that Bukhari himself transmitted. The above edition of Bukhari is extremely hard to get a hold of and the case with the rest of the hadith productions done by independent publishers are "catastrophies". He gives the example of his working on making a proper critical edition of Sunan al-Tirmidhi, and how he realized that it has never been done, and even those sold in shops in Makka are a mess. He gives the example of a block of 10 hadiths that he knew existed in the original text, that were not in any of the printed editions that they used as variant readings. The same goes with the Saudi print of the Musnad of Imam Ahmad, which they paid $22 million to a Syrian scholar for, whose effort was "inadequate" and their edition of the text has 250 more hadith than any of the other printed editions, because no one else bothered to consult the muhadditheen for any of these books. A classical trained scholar of hadith, even if using a printed text to teach from, will be able to easily point this out and correct a student with the upmost of ease. However, amateurs attempting to compare and do the same are bewildered and often make mistakes. He then quotes one of the leading hadith scholars of Egypt who said that none of the fatwas passed by the Islamic Fiqh Academies in Egypt and Saudi can be regarded as binding because they are using these incorrect copies of hadith to issue their rulings.

source http://www.ahlussunnah.net/OMCA/index.htm - Oxford Muslim Community Association

riwaya (the science of the chain of transmission)

takhrij (Hadith verification)

Im not fluent in arabic so if someone knows better please correct me on the matter.