Bugzilla

@roger Interesting, in my case the spurious entries do not disappear. I have to manually delete the duplicate messages. At most a single duplicate message is produced having exactly the same title and date as the original (unlike your image). However, in the message filter log the duplicates are logged as having no title and a date of 01-01-1970 (see my log file snippet above).

Perhaps, we are seeing different but possibly related issues.  Bug 519083 better describes the behaviour I am seeing.