Edgy: Eth0 not setting correct MTU

[Richard]

Why is edgy not configuring eth0 correctly,
mtu's should be around 1500

Here is mine:
2: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 576 qdisc pfifo_fast qlen 1000
    link/ether 00:03:25:28:93:b3 brd ff:ff:ff:ff:ff:ff

Ethernet controller: Marvell Technology Group Ltd. 88E8036 PCI-E Fast Ethernet 
Controller (rev 10)
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As you can see its not 1500 ( Anyone ?? )

Rich