Hi I'm having some performance issues with my wireless network setup (+8Mbit ADSL connection). Currently I have a Dual-band Time Capsule set to Automatic, with an AirPort Extreme on 'Extend Network Mode' and an original AirPort Express in client mode used exclusively for AirTunes. I've attached a diagram to clarify the setup. I'm getting some strange performance issues which I hope you can help me with. 1) On the 'Inside Xbox' channel on Xbox Live (essentially a video streaming service), it takes around 3 minutes to buffer a short 5 minute video. Additionally, while buffering, while looking at AirPort Utility, the network rate goes down from around 108 to 1. It remains at 1 until I stop viewing the video. 2) AirTunes on the AirPort Express is usually connected with a transfer rate of 1 or 5 Mbit - music streaming is impossible and audio is stuttered. 3) The whole network is being used in 2.4Ghz mode. For some reason, when I enable 5Ghz mode, network transfer rates for N-devices drop from 108 to around 17 Mbit. 4) Internet browsing is consistently slow on both computers and iPhone and streaming videos takes a long time. However, speedtest.net says otherwise: 5) The new iTunes store in iTunes 9 takes around 90 seconds to load each page - much slower than before. Thanks in advance for any help you can provide!