kontact enterprise branch crash more frequently

In particular my Kontact:

alessice@pc1-linux:~$ kontact -v
Qt: 3.3.7
KDE: 3.5.8
Kontact: 1.2.4 (enterprise 0.20070907.709405)

when i modify my IMAP subscriptions purge the INBOX, without crash or error, simply all mail in INBOX are deleted. This is more frequently than more big big is the IMAP account on the kolab server. In my case is about 5Gb. With the old kubuntu 7.04 i haven't this problem.

i have found in the log of imapd the moment when kontact expunge all mail:

Oct 30 17:44:25 groupware.prisma-srl.it <debug> imaps[26319]: executed
Oct 30 17:44:25 groupware.prisma-srl.it <debug> imaps[26319]: accepted connection
Oct 30 17:44:25 groupware.prisma-srl.it <notice> imaps[26319]: TLS server engine: cannot load CA data
Oct 30 17:44:25 groupware.prisma-srl.it <debug> imaps[26319]: mystore: starting txn 2147484594
Oct 30 17:44:25 groupware.prisma-srl.it <debug> imaps[26319]: mystore: committing txn 2147484594
Oct 30 17:44:25 groupware.prisma-srl.it <notice> imaps[26319]: starttls: TLSv1 with cipher AES256-SHA (256/256 bits new) no authentication
Oct 30 17:44:25 groupware.prisma-srl.it <notice> imaps[26319]: login: matteo-desktop.prisma.lan [192.168.15.155] <email address hidden> plaintext+TLS User logged in
Oct 30 17:44:53 groupware.prisma-srl.it <debug> imaps[26319]: seen_db: user <email address hidden> opened /kolab/var/imapd/domain/p/prisma-srl.it/user/m/matteo.seen
Oct 30 17:46:48 groupware.prisma-srl.it <debug> imaps[26319]: mystore: starting txn 2147484595
Oct 30 17:46:48 groupware.prisma-srl.it <debug> imaps[26319]: mycommit: committing txn 2147484595
Oct 30 17:46:48 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:18171
Oct 30 17:46:48 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:18172
Oct 30 17:46:48 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:18173
Oct 30 17:46:48 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:18174
[ DELETE ALL ]
Oct 30 17:46:58 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:21293
Oct 30 17:46:58 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:21294
Oct 30 17:46:58 groupware.prisma-srl.it <debug> imaps[26319]: mailbox_expunge: removing mail prisma-srl.it!user.matteo:21295
Oct 30 17:46:58 groupware.prisma-srl.it <notice> imaps[26319]: Deleted 3095 messages from prisma-srl.it!user.matteo
Oct 30 17:46:58 groupware.prisma-srl.it <debug> imaps[26319]: cmd_expunge: user <email address hidden>, mailbox prisma-srl.it!user.matteo, sequence ''

This happens when i update my IMAP subscriptions

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with latest Ubuntu release? Thanks in advance.

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!