Problem in ASA-4-113019 event message

Question

Has anyone come across this (bug, I believe) in their ASA logs for site-to-site?
Apr 23 16:15:24 iac-jtl-mgmt Apr 23 2013 16:15:43: %ASA-4-113019: Group = <IPSec peer IP>, Username = <IPSec peer IP>, IP = <Unknown IP>, Session disconnected. Session Type: LAN-to-LAN, Duration: Xh:XXm:XXs, Bytes xmt: S, Bytes rcv: X, Reason: User Requested
It appears that the ASA software takes an incorrect memory location for the IP = <peer address field>.  I performed packet captures on the outside interface and never saw what I term the "Unknown IP" in the packet captures.  I had to shut down the site-to-site VPN until I could demonstrate that I did not form any IPSec SAs with the "Unknown IP".

Answer 1

We might hit bug id CSCub72545, titled "ASA 9.0 logs incorrect IPs in 113019 messages"
Symptom: When user gets disconnected ASA prints a log message indicating the IP address of connection. This IP address may be displayed wrong.
Conditions: ASA 9.0.1
Workaround: None.
1st Found-In  
8.4(4.4)
9.0(1)
9.1(1.4)
Fixed-In  
8.4(5)
9.1(1.8)
8.4(4.6)
100.8(0.234)M
100.7(6.95)M
100.8(11.36)M
100.7(13.98)M
100.7(24.1)M
100.8(33.21)M
100.9(0.1)M
100.9(3.3)M
8.4(4.99)
100.8(39.1)M
8.7(1.2)
100.8(27.19)M
9.0(1.100)
100.8(34.1)M