Sometimes the KDE System Activity monitor shows processes that don't exist anymore. They don't disappear from the list. 

ps -e, for example, doesn't show these dead processes.

Looks like this happens with GUI programs only, not with command line tools.

Sending TERM or KILL signal to these processes doesn't remove them from the list.

Choosing "Show application window" for these processes doesn't do anything.

Choosing "Detailed memory information" for them shows the memory info window but no information is displayed in it.

Reproducible: Sometimes

Steps to Reproduce:
1. Start the system activity manager and leave it running on the task bar
2. Start programs and close them
3. Switch to the system activity manager and see these programs still there
4. Compare the list with the output of ps -e


Actual Results:  
Dead processes appear in the manager.

Expected Results:  
These processes should not appear on the list.

$ krunner --version
Qt: 4.8.6
KDE Development Platform: 4.14.2
Run Command Interface: 4.11.13