Despite our best efforts, errors occasionally find their way into our patterns. When we find these errors, we repeat the tech editing process and, if need be, have them test knit again. Once we feel confident the pattern is correct, we then contact all Ravelry buyers via Ravelry and email all in-store buyers for whom we have email contact information AND who have not opted out of receiving our emails.
We also occasionally update our patterns to show off new yarns, new formatting, or other reasons. These more cosmetic changes won't trigger a customer alert.