Core Duo mini - Audio Issue

Hi All,
I get random droputs/clicks in audio. Happens when playing iTunes, recording, etc. Seems to be concurrent with Internet access (AirPort and Ethernet) and opening closing apps. Happens when booted from internal or FireWire drive.
Anyone else experiencing this?
C
Core Duo Mac mini
2GB RAM
10.4.8 (all updates)

Narrowing it down to heavy disk access...

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Core Duo mini - Audio Issue

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