Not able to delete mails in 2.4.6

[Ram]

Hello

I had upgraded my imap server to 2.4.6

Some users keep complaining that delete is not working.
Even If I use raw Imap commands and delete the message .. the delete 
flag is not being set

As a fix , If I remove cyrus.* from all the folders in the users 
directory and reconstruct then the problem gets solved
But why does this happen ? How can I debug ?


I have noticed that these users have a line "NonJunk" in the 
cyrus.header file  , Is that any indication of anything ?


Thanks
Ram