Most players in North America may not know that every night -- about 2:30am here in Los Angeles -- something happens in-game that makes it difficult to use the Auction House, bank slots, mail, and vendors. I've been told that this is when the databases are backed up. Whatever the reason, the aforementioned windows become very slow or unresponsive for about 30 minutes.
Usually I take this as a sign that I should be going to bed, not playing DDO. But there are substantial numbers of players for whom this is prime time, many expressing polite displeasure in charming Australian accents.
I assume that this maintenance is scheduled for the time each day when the total server load is lowest, and that it can't be avoided. But perhaps, an hour beforehand, the devs could start sending red-text system-wide announcements saying the nightly backup will begin at _____ o'clock, and that vendor, auction, mail, and bank screens will be slow or unresponsive for a while.
I'm sure our friends overseas would appreciate the warning.