I'd classify myself as a pretty average knitter- I haven't tackled a lot of things I'd like to accomplish but I know enough to teach other people how to knit. I am by no means an expert and still have stumbling blocks (but I guess from what I gather, the experts still have stumbling blocks from time to time too).
Turns out though, one of the stumbling blocks in my progression as a knitter might be coming to realize that the mistakes might not be my own.
That brings be to Knitting Errata, which is the nice way of saying: The pattern we gave is screwed up. It's not going to work, no matter how hard you try. Doesn't matter how many times you knit, frog, reknit, curse, count, check the pattern, curse again. It's just not going to happen!
I've known for a long time that errata existed, and I guess the smart thing to do would be to check for an errata each time I start a new pattern (and perhaps that's what expert knitters do). But I tend to be of the mind that if it's printed in a book or a pattern sold to me and it's going wrong, that I'm doing something wrong, not that the pattern is flawed. I have a certain confidence in the experts who wrote the (expensive) book and the people who test the patterns. And I don't think I'm alone here. As an average or even new knitter I think your first though is- I must be doing something wrong.
My first tip to check for an errata on this particular pattern should have been that I found a mistake immediately while looking it over quickly... what I didn't expect is that there would be 4 more errors in it.
While checking for corrections I was shocked to find about 10 or 12 more patterns and stitches in the book it came from with pretty major errors. But mistakes are human, and we all make them (I certainly make enough of them, there's probably a typo or grammatical error in this post somewhere)... so I think the realization that the mistake might not be my own is an important stumbling block to get over in my progression as a knitter. (That, and checking for corrections at the start might just save me some time and aggravation!)
After ripping it out this last time I think I'm on the road to rights... hopefully!
If you'd like to check your books and patterns for corrections here are some useful resources:
You can also do a search for the publisher of the book, designer or yarn company that provided the pattern. Even searching the pattern or stitch name with the word corrections can produce some results.