Upgraded 7.23 to 7.24 - Help!

Help! Last night I upgraded a production database from 7.23 to 7.24UC2. I have previously successfully upgrade four other servers. The install appeared to install fine. The upgrade appeared to install fine. However, this morning I cannot keep this database up. I am in restore mode but can anyone tell me what this problem might be associated with. Thanks. Chris 10:25:40 Assert Failed: Memory free block header corruption detected in mt_shm_malloc_segid 1 10:25:40 Who: Session(233, sysuser@sflapp3, 3245, 0) Thread(280, sqlexec, 0, 1) 10:25:40 Results: Pool repaired 10:25:40 Action: Please notify Informix Technical Support. 10:25:40 See Also: /tmp/af.11850f3 10:26:34 Checkpoint Completed: duration was 9 seconds. 10:26:56 Assert Failed: Internal Error - Segmentation Violation 10:26:56 Who: Session(307, sysuser@sflapp3, 4006, 252843536) Thread(354, sqlexec, e058ad8, 3) 10:26:56 Results: OnLine must abort 10:26:56 Action: Reinitialize shared memory 10:26:56 See Also: /tmp/af.162513f 10:26:56 rsinit.c, line 10145, thread 354, proc id 1117, Segmentation Violation . 10:26:56 Assert Failed: Segmentation Violation 10:26:56 Who: Session(307, sysuser@sflapp3, 4006, 0) Thread(354, sqlexec, 0, 3) 10:26:56 Results: Fatal Internal Error requires system shutdown 10:26:56 Action: Restart OnLine