[Help] Serious problem upgrading from 2.4.13 to 2.4.14

[Marco]

Hello,

  I'm in panic upgrading Cyrus from 2.4.13 to 2.4.14. After upgrade  
cyrus stop to work with these errors:

IOERROR: opening index uc.csi.it!user.marco^favero: System I/O error

Before upgrade, if I ask a mbpath I see:

mbpath user/marco.favero at uc.csi.it
/metamaildata4/domain/C/uc.csi.it/V/user/marco^favero

After upgrade I see:

mbpath user/marco.favero at uc.csi.it
/maildata/uc.csi.it/maildata1/domain/C/uc.csi.it/P/user/marco^favero

...so it seems Cyrus change paths after upgrade and it loose all mailboxes!
The righ path is  
'/maildata/uc.csi.it/maildata1/domain/C/uc.csi.it/V/user/marco^favero/'  
according to mbpath before upgrade.

This is my cyrus banner:

* OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE AUTH=PLAIN SASL-IR]  
tst-msg01.csi.it Cyrus IMAP v2.4.14-Invoca-RPM-2.4.14-1 server ready
a01 CAPABILITY
* CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE ACL RIGHTS=kxte QUOTA  
MAILBOX-REFERRALS NAMESPACE UIDPLUS NO_ATOMIC_RENAME UNSELECT CHILDREN  
MULTIAPPEND BINARY CATENATE CONDSTORE ESEARCH SORT SORT=MODSEQ  
SORT=DISPLAY THREAD=ORDEREDSUBJECT THREAD=REFERENCES ANNOTATEMORE  
LIST-EXTENDED WITHIN QRESYNC SCAN XLIST URLAUTH URLAUTH=BINARY  
X-NETSCAPE AUTH=PLAIN SASL-IR COMPRESS=DEFLATE IDLE

My host is:
Linux host.csi.it 2.6.18-238.el5 #1 SMP Sun Dec 19 14:22:44 EST 2010  
x86_64 x86_64 x86_64 GNU/Linux

Could you help me to understand what it happens?

This is my imapd.conf:

===
configdirectory: /var/lib/imap
#partition-default: /dev/null
partition-maildata1: /maildata/comune.prova.it/maildata1
partition-maildata2: /maildata/uc.test.it/maildata1
partition-maildata3: /maildata/regione.piemonte.it/maildata1
partition-maildata4: /maildata/uc.csi.it/maildata1
partition-maildata5: /maildata/csi.it/maildata1
partition-maildatadm: /maildata/admin.invalid/maildatadm
#defaultpartition: default

metapartition_files: header index cache expunge squat
metapartition-maildata1: /metamaildata1
metapartition-maildata2: /metamaildata2
metapartition-maildata3: /metamaildata3
metapartition-maildata4: /metamaildata4
metapartition-maildata5: /metamaildata5
metapartition-maildatadm: /metamaildatadm

altnamespace: 0
serverinfo: on
admins: oxcyrus

annotation_definitions: /etc/annoIMAP.conf

sievedir: /var/lib/imap/sieve
postmaster: postmaster at regione.piemonte.it

sendmail: /usr/sbin/sendmail

fulldirhash: 1

hashimapspool: true
#sasl_auxprop_plugin: sasldb
sasl_pwcheck_method: saslauthd
sasl_mech_list: PLAIN
allowapop: 0


quotawarn: 80
normalizeuid: 1
syslog_prefix: cyrus
unixhierarchysep: 1
autocreatequota: 0
implicit_owner_rights: l
createonpost: 0
autosubscribe_all_sharedfolders: yes
expunge_days: 30
singleinstancestore: 1
defaultdomain: admin.invalid
improved_mboxlist_sort: 1
virtdomains: userid
quotadb: skiplist

allowusermoves: 1

====
I thank you very very much!
Regards
Marco