So far about a dozen members have reported the loss of access; most have registered an -A handle (e.g., ck1942-A) and we have given them whatever access, provider, bcd, etc. they had before.

For those who speak computerese, the "member table" was corrupted. Meaning the index connecting various portions of the user interface, user account data, etc. Why it happened, not a clue on my end; these things happen from time to time.

So a "missing" account still shows as posts and threads, but is not in the member list nor in the admin/moderator panel.

We have enough info on virtually all members so the programmer can reconstruct that piece of the member table and then reconnect the portions and the member can have access to the original account.

We don't believe any of the data has been lost, but too early to hear back if a member's PMs, for example, might be affected.