Yes , I have found mistakes. I bought a book , quite pricey I might add. I reviewed the pattern several times , and noticed a few abvious errors... so I went to the internet and found the authors web page... and there was a whole section for "corrections" to her patterns and books... The book I purchased .. had 50 pages with errors. Some just spelling, other very serious such as yardage requirements.
I felt such a heavy flawed book would be able to be exchanged for a version( printing) that had the corrections... No I was told to print off the corrections and just keep them with the copy I purchased.
The rush to publish has left the consumer with a lack of confidence. It seems that if I pay for a book or pattern I should be entitled to a level of accuracy.