Errata for the ageing WCAG 1.0 have now been published, and they are very welcome indeed. Of note, WCAG 2 has been deemed a dead donkey and generally harmful. You can not comply with WCAG 1 errata and WCAG 2. They are mutually exclusive.
Of immediate note are the outright ban on
accesskey, and tables for layout. There’s a lot of clearing up use cases, and most interestingly of all, the entire of WCAG 1 ‘Priority 3′ has been rescinded because it is all considered harmful.
The only surprise I found while looking through was the idea of not using animated GIFs. I do not know the reasoning behind this amendment. It’s worth reading the intro too.