Then freeze happends, no additional messages are shown.
But just after freeze (when I try to move or do something in a game) in a GDB it says:
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
Wed Jun 8 10:13:10 2011, <src/common/net/netbase.cpp:1406 QueueMessage SEVERE>
Wed Jun 8 10:13:10 2011, *** Input Buffer Full! Yielding for packet, client 0, type MSGTYPE_DEAD_RECKONING, input queue 0!
...
This message is repeated endlessly...
I, too, have exactly this.
Lockup happens most, times on loading the game.