Upgrading cyrus-imapd troubles

[A Ve]

Dear users,

i upgraded from cyrus-imapd-2.2.10-3.fc3.i386.rpm -> cyrus-imapd.i386
0:2.2.10-11.2.fc4 with yum, but after restarting the imap-Server, i get
following output in my maillog, and imap connections are not working
anymore ... Any hints ? Did I miss something ?

Regards, AVE.

---

Feb 22 12:25:12 mail master[2596]: process started
Feb 22 12:25:12 mail master[2598]: about to exec
/usr/lib/cyrus-imapd/ctl_cyrusdb
Feb 22 12:25:12 mail ctl_cyrusdb[2598]: DBERROR
                                               : db4
Feb 22 12:25:13 mail ctl_cyrusdb[2598]: recovering cyrus databases
Feb 22 12:25:13 mail ctl_cyrusdb[2598]: skiplist: recovered
/var/lib/imap/mailboxes.db (19 records, 3844 bytes) in 0 seconds
Feb 22 12:25:13 mail ctl_cyrusdb[2598]: skiplist: recovered
/var/lib/imap/annotations.db (0 records, 144 bytes) in 0 seconds
Feb 22 12:25:13 mail ctl_cyrusdb[2598]: DBERROR
                                               : db4
Feb 22 12:25:13 mail ctl_cyrusdb[2598]: DBERROR                           
                   : db4
Feb 22 12:25:13 mail ctl_cyrusdb[2598]: DBERROR: critical database situation
Feb 22 12:25:13 mail master[2596]: process 2598 exited, status 75
Feb 22 12:25:13 mail master[2599]: about to exec /usr/lib/cyrus-imapd/idled
Feb 22 12:25:13 mail idled[2599]: DBERROR : db4
Feb 22 12:25:13 mail idled[2599]: DBERROR: critical database situation
Feb 22 12:25:13 mail master[2596]: process 2599 exited, status 75
Feb 22 12:25:13 mail master[2596]: ready for work
Feb 22 12:25:13 mail master[2600]: about to exec
/usr/lib/cyrus-imapd/ctl_cyrusdb
Feb 22 12:25:13 mail ctl_cyrusdb[2600]: DBERROR
                                               : db4
Feb 22 12:25:13 mail ctl_cyrusdb[2600]: DBERROR: critical database situation
Feb 22 12:25:13 mail master[2596]: process 2600 exited, status 75

Feb 22 12:25:13 mail master[2601]: about to exec /usr/lib/cyrus-imapd/imapd
Feb 22 12:25:13 mail master[2602]: about to exec /usr/lib/cyrus-imapd/imapd
Feb 22 12:25:13 mail master[2603]: about to exec /usr/lib/cyrus-imapd/lmtpd
Feb 22 12:25:13 mail imaps[2602]: DBERROR
                                          6
                                          : db4
Feb 22 12:25:13 mail imaps[2602]: DBERROR: critical database situation
Feb 22 12:25:13 mail master[2596]: process 2602 exited, status 75
Feb 22 12:25:13 mail master[2596]: service imaps pid 2602 in READY state:
terminated abnormally
Feb 22 12:25:13 mail master[2604]: about to exec /usr/lib/cyrus-imapd/imapd
Feb 22 12:25:13 mail imap[2604]: DBERROR
                                         6