In messageserver.log, what does "[Warning] Huh? unfinished escape sequence..." mean? I see this a lot and wonder if it has something to do with the inability to download certain attachments.

Here is a log snippet:

[2231] 1 30 21:30:39 [Debug] Messaging : IMAP : connection established
[2231] 1 30 21:30:40 [Debug] Messaging : IMAP : Secure connection established
[2231] 1 30 21:30:40 [Debug] IMAP : "1" RECV: * OK Seznam IMAP server ready
[2231] 1 30 21:30:40 [Debug] IMAP : "1" SEND: a001 CAPABILITY
[2231] 1 30 21:30:40 [Debug] IMAP : "1" RECV: * CAPABILITY IMAP4rev1 AUTH=PLAIN CHILDREN
[2231] 1 30 21:30:40 [Debug] IMAP : "1" RECV: a001 OK CAPABILITY completed
[2231] 1 30 21:30:40 [Debug] IMAP : "1" SEND: a002 LOGIN *login deleted* <password hidden>
[2231] 1 30 21:30:40 [Debug] IMAP : "1" RECV: a002 OK LOGIN Authentication succeeded
[2231] 1 30 21:30:40 [Debug] IMAP : "1" SEND: a003 SELECT sent
[2231] 1 30 21:30:40 [Debug] IMAP : "1" RECV: * 23 EXISTS
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: * 0 RECENT
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: * FLAGS (\Seen \Answered \Flagged \Deleted \Draft \Recent)
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft)] Can bee changed permanently
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: * OK [UIDVALIDITY 1318919716] UIDs validity number
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: * OK [UIDNEXT 102] Predicted next UID
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: a003 OK [READ-WRITE] SELECT completed
[2231] 1 30 21:30:41 [Debug] IMAP : "1" SEND: a004 UID FETCH 98 (UID BODY.PEEK[1.2])
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: * 23 FETCH (UID 98 BODY[1.2] {32}
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: <32 literal bytes received>
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: )
[2231] 1 30 21:30:41 [Warning] Huh? unfinished escape sequence...
[2231] 1 30 21:30:41 [Warning] Huh? unfinished escape sequence...
[2231] 1 30 21:30:41 [Debug] IMAP : "1" RECV: a004 OK FETCH completed
[2231] 1 30 21:30:42 [Debug] IMAP : "1" SEND: a005 LOGOUT
[2231] 1 30 21:30:42 [Debug] IMAP : "1" RECV: * BYE Thanks for your visit, have a nice day.
[2231] 1 30 21:30:42 [Debug] IMAP : "1" RECV: a005 OK LOGOUT Completed.