Just want to add to this thread that I'm seeing this behavior on BIRD as well, I'm seeing this on all the machines that I've installed. From the timer, it appeared to happened every 5 seconds....

root@sje17:~# birdc -v

0001 BIRD 1.3.4 ready.

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0005, Id: 10.25.206.123, Rt: 10.25.15.11)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0005, Id: 10.25.205.147, Rt: 10.25.15.17)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0001, Id: 10.25.15.3, Rt: 10.25.15.3)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0001, Id: 10.25.15.4, Rt: 10.25.15.4)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0002, Id: 10.25.202.1, Rt: 10.25.239.11)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0002, Id: 10.25.201.1, Rt: 10.25.239.10)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0002, Id: 10.25.201.13, Rt: 10.25.239.10)

Jan 8 02:34:30 sje17 bird: OSPF: LSA disappeared (Type: 0005, Id: 10.25.201.12, Rt: 10.25.10.4)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0005, Id: 10.25.206.123, Rt: 10.25.15.11)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0005, Id: 10.25.205.147, Rt: 10.25.15.17)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0001, Id: 10.25.15.3, Rt: 10.25.15.3)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0001, Id: 10.25.15.4, Rt: 10.25.15.4)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0002, Id: 10.25.202.1, Rt: 10.25.239.11)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0002, Id: 10.25.201.1, Rt: 10.25.239.10)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0002, Id: 10.25.201.13, Rt: 10.25.239.10)

Jan 8 02:34:35 sje17 bird: OSPF: LSA disappeared (Type: 0005, Id: 10.25.201.12, Rt: 10.25.10.4)

-bn
0216331C