21d 15:22:31 until the OGMW forums will transition to fully read-only mode. Read more here.
For consistency with the new site, OGMW now accepts email address as a login credential in addition to user name. User name will eventually be removed, so we recommend getting in the habit of using email address going forward.
IIRC, Master Thrower and Invisible Blade were initially one class which got split into two. However, due to an editing mistake, no one changed the prerequisites for Invisible Blade.
That sounds suitably inane to be the truth. And of course since it was only a set of silly prerequisites and not something that was destroying game balance they never bothered with an errata.