Hi This happens when email is copied/moved from the inbox to another folder on the same imap account. The mail client goes into a loop with the below errors logged. This is on a 64bit Linux machine using the Maildir storage format. After doing a 'rm dovecot*' from the Maildir folder of the account having the problem the client can log in again but if the client tries to copy again it gets the same error. RC9 appears to be broken on this box. I have tested connecting form a windows machine and I get the same with thunderbird. I have tried with different accounts and they get the same problem. I have down graded to RC8 and all is working OK so seems to be a problem introduced with RC9. I have a 32bit Linux server with RC9 installed which has around 2000 accounts on it and this has no problems so maybe not affecting 32bit machines. If I can give any more information please let me know. Am getting this error with Dovecot rc9 on a imap account. Oct 15 10:55:28 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:28 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:28 bajor dovecot: child 27632 (imap) killed with signal 6 Oct 15 10:55:28 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:29 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:29 bajor dovecot: child 27636 (imap) killed with signal 6 Oct 15 10:55:29 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:29 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:29 bajor dovecot: child 27638 (imap) killed with signal 6 Oct 15 10:55:30 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:30 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:30 bajor dovecot: child 27641 (imap) killed with signal 6 Oct 15 10:55:30 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:31 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:31 bajor dovecot: child 27645 (imap) killed with signal 6 Oct 15 10:55:31 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:31 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:31 bajor dovecot: child 27649 (imap) killed with signal 6 Oct 15 10:55:31 bajor dovecot: imap-login: Login: user=<rachele>, method=plain, rip=192.168.1.1, lip=192.168.1.254 Oct 15 10:55:32 bajor dovecot: IMAP(rachele): file mail-cache-transaction.c: line 709 (mail_cache_add): assertion failed: (fixed_size == (unsigned int)-1 || fixed_size == data_size) Oct 15 10:55:32 bajor dovecot: child 27653 (imap) killed with signal 6 -- Regards Daniel ----------------------------- Registered Linux user #234279