Version: 1.9.6 (using KDE 3.5.6 "release 31.3" , openSUSE ) Compiler: Target: i586-suse-linux OS: Linux (i686) release 2.6.18.2-34-default There is a checkbox in a kmail folder properties - "notify on unread messages" (I don't know exactly english translation). If I unset this checkbox, kmail continues to notify me, until I restart kmail. After restart, all works propertly.
The setting is called "Act on new/unread mail in this folder" in english (just added this for easier report searching later on)
Alive on kmail 1.11.0 (KDE 4.2.0)
Works fine in 4.4.5