A new server was installed last night. The old one was upgraded to its limit and crashed when overloaded, particularly on weekends. Its replacement has more power and room to expand so Vimm's Lair should be stable once more.
The Redump refresh continues in the PlayStation Vault and each game from A-J is now Redump verified. Server upgrades and troubleshooting has slowed this effort so now it can kick into gear again.