Heb dit gevonden:
http://support.apple.com/kb/HT3466What's new in this update?
For AirPort Extreme (Early 2009) and Time Capsule (Early 2009) that ship with firmware 7.4, the firmware 7.4.1 update:
Resolves an issue in which a client computer may be disconnected when waking from sleep
Addresses an issue in which redirecting SMTP port services may disable IP-layer networking
Improves the reliability of Back to My Mac-based disk sharing
Includes recent AirPort security updates
For AirPort Extreme with 802.11n (Fast Ethernet), AirPort Extreme with 802.11n (Gigabit Ethernet), AirPort Express with 802.11n, and original Time Capsule models, the firmware 7.4.1 update:
Enables remote administration and remote access to compatible USB connected drives via Back to My Mac (except on AirPort Express)
Improves reliability when backing up to a Time Capsule via Time Machine
Includes recent AirPort security updates