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.
Patterns downloaded before Jan 3, '13 included a misplaced decrease symbol on chart Row 34.
Patterns purchased before Jan 11, '11 - The last stitches on Rows 25 and 49 on Back and Right Front Charts should be ssk, not k2tog