Version:           1.0.1 (using KDE 4.5.1) 
OS:                Linux

Sometimes I click on Check for Updates, or in Apply, then the commands bar become unusable as like as moun would be running the expected action, but muon does nothing.

Reproducible: Sometimes

Steps to Reproduce:
1) Open Muon and click very quickly in Check for Updates.
OR
1) Check for updates.
2) Click on Full Upgrade.
2) Click on Apply.

Actual Results:  
Moun does not run the expected action, but it disable the commands as like as it would be doing it.

Expected Results:  
Moun should start to run the expected action when you click on a command.

Policykit-kde related?
May be it does not start the action because the policykit-kde dialogue does not appears?