[Scmail] Held mail

[Andrew Hoddinott]

Recently when reporting my held email through the
http://www.spamcop.net/reportheld
page I get a fair number of error messages of the form:
    Message-ids have changed, cannot alter 10247
    Message-ids have changed, cannot alter 10248
    Message-ids have changed, cannot alter 10249
    Message-ids have changed, cannot alter 10250
And occasional errors of the form:
    Database error submitting spam for reporting

I've a feeling this began with the switch over to the new webmail
interface, but it may be unrelated.

Is this a known problem, and is there a workaround?