On Saturday June 4, 2011 NuevaSync added a AAAA (IPv6 address) DNS record for the host name www.nuevasync.com This allows devices with IPv6 connectivity to sync using IPv6. Unfortunately it also means that most Nokia N900 devices will stop syncing due to this Nokia bug : https://bugs.maemo.org/show_bug.cgi?id=9943 N900 owners experiencing this problem should reconfigure the device to use this host name : ipv4.nuevasync.com This works around the bug because that host name has no AAAA DNS record.