Lots of packet drops on Soekris 4801

I have stumbled upon something strange, since voyage linux 0.7 there seem to
be allot of packet drops on the eth interfaces. I have seen this on both the
Soekris 4501 and 4801, since they both share the same network devices I can
conclude that there is a bug in the Natsemi network driver that is included
in these voyage linux kernels, or at least in combination with the later
kernel releases.

I have tested four 4801's and a couple of 4501's to make sure it's not a
defective NIC

This is the ifconfig from a net4801 with Voyage Linux 0.7:
eth0      Link encap:Ethernet  HWaddr 00:00:24:ce:a4:7c  
          inet addr:192.168.41.112  Bcast:192.168.41.255  Mask:255.255.255.0
          inet6 addr: fe80::200:24ff:fece:a47c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5152715 errors:181 dropped:48488 overruns:181 frame:0
          TX packets:3213713 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:382469028 (364.7 MiB)  TX bytes:415270067 (396.0 MiB)
          Interrupt:10 

This is the ifconfig from a net4801 with Voyage Linux 0.6:
eth0      Link encap:Ethernet  HWaddr 00:00:24:ce:a4:78  
          inet addr:192.168.41.228  Bcast:192.168.41.255  Mask:255.255.255.0
          inet6 addr: fe80::200:24ff:fece:a478/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:112818 errors:0 dropped:0 overruns:0 frame:0
          TX packets:55088 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:58262894 (55.5 MiB)  TX bytes:8595400 (8.1 MiB)