Hello,
The mailing list software at Wikipedia has been upgraded. Though there seem to still be some problems with new subscribers, everything should work reasonable well for all of the current listmembers.
I realize it would have been more prudent of me to say "I'll be upgrading the mailing list software on Friday, between 2pm and 8pm PST", and I'd like to apologize to anyone who was adversely affected by the upgrade for my lack of notification. I'll be more considerate in the future.