Problem s fetchmail - "Error locking your mailbox"

[Rastislav Contofalsky]

    Prosim o radu pri probleme s prevadzkovanim fetchmailu.
    Stahujem postu z Linuxoveho servera na internete pomocou programu
fetchmail cez POP3. Fetchmail mam nastaveny tak, ze spravu zo servera by mal
odmazavat hned po jej stiahnuti (expunge 1). Posledne dni mam v logu
pravidelne hlasku "Error locking your mailbox".
    Cize sprava sa to tak, ze po stiahnuti mailu ho doruci uzivatelovi, ale
neodmaze ho zo servera na internete a opatovne ho taha (a tak dookola).
Pritom do logu zapise hlasku "Error locking your mailbox".

Prosim aspon o nakopnutie spravnym smerom ...

                                Dakujem za vsetky odpovede

PS: Prikladam vypis z logu (hlaska `Error locking your mailbox` sa tam
objavuje dookola)

Jan 19 06:58:13 isvsrp fetchmail[1990]: 16 messages for vs at
mail.xxx.sk (1486760 octets).
Jan 19 06:58:14 isvsrp fetchmail[1990]: reading message 1 of 16 (64655
octets)
Jan 19 06:58:29 isvsrp scanmails[19780]: execution started
Jan 19 06:58:31 isvsrp scanmails[19847]: terminating
Jan 19 06:59:03 isvsrp fetchmail[1990]: flushed
Jan 19 06:59:05 isvsrp fetchmail[1990]: fetchlimit 1 reached; 15 messages
left on server
Jan 19 06:59:05 isvsrp fetchmail[1990]: Error locking your mailbox
Jan 19 06:59:10 isvsrp fetchmail[1990]: 16 messages for vs at
mail.xxx.sk (1486760 octets).
Jan 19 06:59:16 isvsrp fetchmail[1990]: reading message 1 of 16 (64655
octets)
Jan 19 06:59:29 isvsrp scanmails[19869]: execution started
Jan 19 06:59:31 isvsrp scanmails[19935]: terminating
...