While my editors and I do our best to check and double check ... and triple check! everything, we're not perfect. If an error is discovered though, patterns are always revised and updated right away. And if an error is major - enough to throw you off or mess up your project, you'll receive a notification by email if you purchased a download from this website or by pm if you bought it on Ravelry.
A pattern might also be revised and updated for a variety of other reasons - to correct a minor typo, to tweak the wording if it might make things a bit clearer, or to add a new photo if I happen to get a better shot.
Most patterns will have a version number at the bottom of the first page, such as, v.1.18.12, which is reflective of the date (month.day.year) when the pattern was last updated.
You may get the latest version at any time by clicking on your original pattern link,
or by requesting an update: firstname.lastname@example.org.
Jan 23, 2016: The Night Birds pattern has been overhauled with brand new easier-to-follow charts, as well as easier-to-follow written instructions. Happy to send you an updated version. Just ask.
For patterns purchased before Jan 26 2013: On the inside page, far left column, under Left Glove Rnds 11-19, it reads:
"Workchart Rnds 11-19 ..."
but should read:
"Work chart Rnds 11-19..."