Apparently, over the weekend, it seems that the user-pages of nearly 80 currently employed and ex-Linden Lab staff were mass-deleted from the Second Life wiki, along with related meeting transcripts, modification histories, revisions and the like.
There doesn’t seem to be any rhyme or reason to the deletions. Some are still there while some are gone, and whether the staff-member in question is currently employed or not doesn’t seem to be a major determining factor.
The deletion appears to have been software-generated, and not performed or triggered by a third-party (ie. Linden Lab appears to have elected to do this).
It still might, potentially, be accidental. I’ve contacted the Lab spokespeople for comment, though they are not immediately available to do so.
UPDATE (9:36AM – US Pacific):
A Linden Lab spokesperson provided the following statement on behalf of the Lab:
“After a careful review of the content, we’ve removed a number of pages from the Second Life wiki as part of an ongoing clean-up effort, designed to make that resource more current, more helpful, and less confusing than it has been in the past. Where appropriate, we’ll move valuable content (relevant tutorials, for example) to other pages.“