duplicate pings over dvb

[Danijel Pajur <dpajur@irb.hr>]

i got the dvbd running on the third box I've tried.. seems my card is
compatibile but there are other problems apparently unresolved with more
exotic hardware :) anyways, i set up squid on the box with the dvb
interface, and when i have traffic over dvb i get duplicate ping replies
like this:

PING 194.177.32.196 (194.177.32.196): 56 data bytes
64 bytes from 194.177.32.196: icmp_seq=0 ttl=255 time=335.1 ms
64 bytes from 194.177.32.196: icmp_seq=0 ttl=255 time=335.4 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=1 ttl=255 time=300.0 ms
64 bytes from 194.177.32.196: icmp_seq=1 ttl=255 time=300.3 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=2 ttl=255 time=305.9 ms
64 bytes from 194.177.32.196: icmp_seq=2 ttl=255 time=306.1 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=3 ttl=255 time=294.7 ms
64 bytes from 194.177.32.196: icmp_seq=3 ttl=255 time=295.0 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=4 ttl=255 time=302.2 ms
64 bytes from 194.177.32.196: icmp_seq=4 ttl=255 time=302.6 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=5 ttl=255 time=322.1 ms
64 bytes from 194.177.32.196: icmp_seq=5 ttl=255 time=322.3 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=6 ttl=255 time=308.7 ms
64 bytes from 194.177.32.196: icmp_seq=6 ttl=255 time=309.0 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=7 ttl=255 time=304.8 ms
64 bytes from 194.177.32.196: icmp_seq=7 ttl=255 time=305.1 ms (DUP!)
64 bytes from 194.177.32.196: icmp_seq=8 ttl=255 time=295.5 ms
64 bytes from 194.177.32.196: icmp_seq=8 ttl=255 time=295.8 ms (DUP!)

is this a normal behavior?
only one dvbd is running..