Hi This problem happened to me in an older version of kde before and I solved it. I am now running the new kde 4.1 so I cannot give accurate steps but just a hint.
The problem is due to a filter generated by either anti-spam or might be the anti-virus tool. It created a filter that instead of checking for a size greater than x to run the filter, it checks for a size less than x or vice versa. If you open the filters, you can easily see the problem and just removing that culprit filter fixed it for me. Sorry for not reporting earlier to save others some valuable time. -- [Data Loss] KMail mysteriously changes messages to "No Subject", "Unknown" sender https://bugs.launchpad.net/bugs/50039 You received this bug notification because you are a member of Kubuntu Team, which is a bug assignee. -- kubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs