And I'd just want to say that there were already many mistakes and contradictions in the EU before the PT...
For example: I don't remember in which book is it, but at a moment, it's said that Obi-Wan and Owen Lars are brothers (!?)...
All that is pretty much normal, SW is a huge universe, and many different author have worked on it. But it's clear that the PT has gave many confusions. Some times, it's like Lucas has never wrote his stories thinking of the EU. Fortunately, there are some people at Lucasfilm Licensing who do their best to "fix" mistakes...
But one of the biggest contradiction has been made recently. It's about the outer rim mission of Obi-Wan and Anakin. We all know where they have been in Clone Wars series, but it seems that a book, wrote before, tells another story... pretty weird for a such important event...