I'm seeing this error too.
Here's the log:
2004.01.23 16:10:21 <<<< Logging Started (level is LTF_TRACE) >>>>
2004.01.23 16:10:21 pop.pacbell.yahoo.com: Synch operation started (flags = 00000001)
2004.01.23 16:10:21 pop.pacbell.yahoo.com: UploadItems: 0 messages to send
2004.01.23 16:10:21 pop.pacbell.yahoo.com: Synch operation completed
2004.01.23 16:10:21 pop.pacbell.yahoo.com: Synch operation started (flags = 00000030)
2004.01.23 16:10:21 pop.pacbell.yahoo.com: DoPOPDownload(flags = 00000030, max msg = ffffffff): full items
2004.01.23 16:10:21 POP3 (localhost): Begin execution
2004.01.23 16:10:21 POP3 (localhost): ========= Initial blob =========
2004.01.23 16:10:21 POP3 (localhost): ===================================
2004.01.23 16:10:21 California.com: Synch operation started (flags = 00000001)
2004.01.23 16:10:21 POP3 (localhost): Port: 110, Secure: no, SPA: no
2004.01.23 16:10:21 POP3 (localhost): Finding host
2004.01.23 16:10:21 California.com: UploadItems: 1 messages to send
2004.01.23 16:10:21 POP3 (localhost): Connecting to host
2004.01.23 16:10:21 POP3 (localhost): Connected to host
2004.01.23 16:10:21 SMTP (mail.california.com): Begin execution
2004.01.23 16:10:21 California.com: Synch operation started (flags = 00000030)
2004.01.23 16:10:21 SMTP (mail.california.com): Port: 25, Secure: no, SPA: no
2004.01.23 16:10:21 SMTP (mail.california.com): Finding host
2004.01.23 16:10:21 POP3 (localhost): <rx> +OK MSK POP3 Server ready
2004.01.23 16:10:21 POP3 (localhost): Authorizing to server
2004.01.23 16:10:21 POP3 (localhost): [tx] USER (e-mail address removed)
2004.01.23 16:10:21 SMTP (mail.california.com): Connecting to host
2004.01.23 16:10:22 California.com: DoPOPDownload(flags = 00000030, max msg = ffffffff): full items
2004.01.23 16:10:22 POP3 (localhost): <rx> +OK Password required
2004.01.23 16:10:22 POP3 (localhost): [tx] PASS *****
2004.01.23 16:10:22 POP3 (localhost): Begin execution
2004.01.23 16:10:22 POP3 (localhost): <rx> +OK Logged in
2004.01.23 16:10:22 POP3 (localhost): Authorized to host
2004.01.23 16:10:22 POP3 (localhost): Connected to host
2004.01.23 16:10:22 POP3 (localhost): [tx] STAT
2004.01.23 16:10:22 SMTP (mail.california.com): Connected to host
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 220 california.com ESMTP CommuniGate Pro 4.1.5 is glad to see you!
2004.01.23 16:10:22 SMTP (mail.california.com): [tx] EHLO maxfield
2004.01.23 16:10:22 POP3 (localhost): <rx> +OK 0 0
2004.01.23 16:10:22 POP3 (localhost): ==== Comparing server and local blobs ====
2004.01.23 16:10:22 POP3 (localhost): ==========================================
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-california.com we trust you maxfield
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-HELP
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-PIPELINING
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-ETRN
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-DSN
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-TURN
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-ATRN
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-SIZE 314572800
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-STARTTLS
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250-8BITMIME
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250 EHLO
2004.01.23 16:10:22 SMTP (mail.california.com): Authorized to host
2004.01.23 16:10:22 SMTP (mail.california.com): Connected to host
2004.01.23 16:10:22 SMTP (mail.california.com): [tx] MAIL FROM: <*****>
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250 ***** sender accepted
2004.01.23 16:10:22 SMTP (mail.california.com): [tx] RCPT TO: <*****>
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250 ***** will relay mail from a client address
2004.01.23 16:10:22 SMTP (mail.california.com): [tx] RCPT TO: <*****>
2004.01.23 16:10:22 SMTP (mail.california.com): <rx> 250 ***** will relay mail from a client address
2004.01.23 16:10:22 SMTP (mail.california.com): [tx] RCPT TO: <*****>
2004.01.23 16:10:22 POP3 (localhost): Do deletions: LoS: no
2004.01.23 16:10:22 POP3 (localhost): Disconnecting from host
2004.01.23 16:10:22 POP3 (localhost): [tx] QUIT
2004.01.23 16:10:22 POP3 (localhost): <rx> +OK Goodbye
2004.01.23 16:10:22 POP3 (localhost): Disconnected from host
2004.01.23 16:10:22 POP3 (localhost): ========= No blob changes =========
2004.01.23 16:10:22 POP3 (localhost): ===================================
2004.01.23 16:10:22 POP3 (localhost): End execution
2004.01.23 16:10:22 pop.pacbell.yahoo.com: ReportStatus: RSF_COMPLETED, hr = 0x00000000
2004.01.23 16:10:22 pop.pacbell.yahoo.com: Synch operation completed
2004.01.23 16:10:22 POP3 (localhost): ========= Initial blob =========
2004.01.23 16:10:22 POP3 (localhost): ===================================
2004.01.23 16:10:23 POP3 (localhost): Port: 110, Secure: no, SPA: no
2004.01.23 16:10:23 POP3 (localhost): Finding host
2004.01.23 16:10:23 SMTP (mail.california.com): <rx> 250 ***** will relay mail from a client address
2004.01.23 16:10:23 SMTP (mail.california.com): [tx] DATA
2004.01.23 16:10:23 POP3 (localhost): Connected to host
2004.01.23 16:10:23 SMTP (mail.california.com): <rx> 354
2004.01.23 16:10:23 POP3 (localhost): <rx> +OK MSK POP3 Server ready
2004.01.23 16:10:23 POP3 (localhost): Authorizing to server
2004.01.23 16:10:23 POP3 (localhost): [tx] USER (e-mail address removed)
2004.01.23 16:10:23 POP3 (localhost): <rx> +OK Password required
2004.01.23 16:10:23 POP3 (localhost): [tx] PASS *****
2004.01.23 16:10:23 POP3 (localhost): <rx> +OK Logged in
2004.01.23 16:10:23 POP3 (localhost): Authorized to host
2004.01.23 16:10:23 POP3 (localhost): Connected to host
2004.01.23 16:10:23 POP3 (localhost): [tx] STAT
2004.01.23 16:10:23 POP3 (localhost): <rx> +OK 0 0
2004.01.23 16:10:23 POP3 (localhost): ==== Comparing server and local blobs ====
2004.01.23 16:10:23 POP3 (localhost): ==========================================
2004.01.23 16:10:23 POP3 (localhost): Do deletions: LoS: no
2004.01.23 16:10:23 POP3 (localhost): Disconnecting from host
2004.01.23 16:10:23 POP3 (localhost): [tx] QUIT
2004.01.23 16:10:23 POP3 (localhost): <rx> +OK Goodbye
2004.01.23 16:10:23 POP3 (localhost): Disconnected from host
2004.01.23 16:10:23 POP3 (localhost): ========= No blob changes =========
2004.01.23 16:10:23 POP3 (localhost): ===================================
2004.01.23 16:10:23 POP3 (localhost): End execution
2004.01.23 16:10:23 California.com: ReportStatus: RSF_COMPLETED, hr = 0x00000000
2004.01.23 16:10:23 California.com: Synch operation completed
2004.01.23 16:10:23 SMTP (mail.california.com): [tx]
...
2004.01.23 16:11:23 California.com: Synch operation queued
2004.01.23 16:11:23 SMTP (mail.california.com): End execution
2004.01.23 16:11:24 California.com: ReportStatus: RSF_COMPLETED, hr = 0x8004210b
2004.01.23 16:11:24 California.com: Synch operation completed
2004.01.23 16:11:24 California.com: Synch operation dequeued (flags = 00000001)
2004.01.23 16:11:24 California.com: Synch operation started (flags = 00000001)
2004.01.23 16:11:24 California.com: UploadItems: 1 messages to send
2004.01.23 16:11:24 SMTP (mail.california.com): Begin execution
2004.01.23 16:11:24 SMTP (mail.california.com): End execution
2004.01.23 16:11:24 California.com: ReportStatus: RSF_COMPLETED, hr = 0x800ccc0b
2004.01.23 16:11:24 California.com: Synch operation completed
2004.01.23 16:11:32 Resource manager terminated