In addition to the server maintenance taking place throughout this week, the Lab has announced an additional period of maintenance which will be taking place on Wednesday, November 19th. The Grid Status post announcing the work reads in full:
Scheduled Server Maintenance
[Posted 12:10 PM PDT, 18 November 2014] We will be performing additional scheduled maintenance on 19 November at approximately 1:00 AM PST. During this time, some residents may experience login issues and residents in-world may be logged off or experience degraded performance. Additionally, during this time Group Chat may fail. Please refrain from rezzing no-copy objects and making L$ transactions during this maintenance. Please check back here for updates.