I apologize. I may have been unclear when I started this thread.
What I was asking was if there was a thread or website that covers how any particular novel might contradict another novel or TV canon. For example, New Earth and Deep Domain show Chekov receiving his promotion transfer in different ways.
You guys have given a lot of good examples of contradictions but I was looking for something a little more comprehensive.
Being a Doctor Who fan as well, I have been spoiled by incredibly thorough sites such as The Doctor Who Reference Guide, The Discontinuity Guides, etc. and was wondering if there was a Star Trek equivalent. I've checked Memory Beta but its not quite what I was thinking of even though it IS a great resource.
Thanks for your help,