[binc] NOOP fails (from time to time)

Hi,
sometimes the connection to Binc fails when sending NOOP; this is what it
looks like: 

,---
| 519 NOOP
| 519 OK NOOP completed
| 520 NOOP
| 520 OK NOOP completed
| 521 CLOSE
| 521 OK CLOSE completed
| 522 STATUS "INBOX" (UNSEEN)
| * STATUS "INBOX" (UNSEEN 0)
| 522 OK STATUS completed
| (... more STATUS of different subfolders ...)
| 533 NOOP
| * BYE Invalid Mailbox, /new/: No such file or directory
`--- 

strace says: 

,---
| write(6, "533 NOOP\r\n", 10) = 10
| --- SIGCHLD (Child exited) ---
| select(8, [0 7], NULL, NULL, {2160, 0}) = 1 (in [7], left {2160, 0})
| read(7, "* BYE Invalid Mailbox, /new/: No"..., 8192) = 57
| alarm(1200)                             = 0
| write(1, "\27\3\1\0I\216\362(\320\377&\5\370\20F\256\347\366X\363"..., 78) 
=
| 78
| alarm(0)                                = 1200
| select(8, [0 7], NULL, NULL, {2160, 0}) = 1 (in [7], left {2160, 0})
| read(7, "", 8192)                       = 0
| close(7)                                = 0
| close(6)                                = 0
| wait4(14888, [WIFEXITED(s) && WEXITSTATUS(s) == 0], 0, NULL) = 14888
| alarm(1200)                             = 0
| write(2, "14879 1 [[email protected]:]"..., 86) = 86
| alarm(0)                                = 1200
| munmap(0x28978000, 4096)                = 0
| _exit(0)
`--- 

It seems Binc is missing the path in "path + /new/" (maildir-scan.cc) after
some time.
Juergen