AirPort connection cuts out with heavy disk traffic

My AirPort connection often cuts out when there's heavy demand on the connected USB drive.
Is there some way of avoiding this?

My AEBS (802.11n, non-Gigabit version) does the same thing: drops the disk connection during a large file transfer from time to time. Makes the AirDisk problematic for backups.
The AEBS is at 7.2.1
My PowerBook is at 10.4.10
To paraphrase Fox Mulder, +you are not alone+.

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