Serious problem with Plasma-desktop

[Hervé Piedvache]

Hi,

I'm using Lucid ... and I have a problem with Plasma-desktop ... sometime ... 
but regulary ... quite close to once by day ... I have my clock who lose 
something like 2 hours and the running application icons start to misc 
themself ... (firefox is under kontact, and I can't click on it!) ...

I have done all my upgrade ... don't found anything arround this throught 
Google ...

Restarting with a command like :
kquitapp plasma-desktop; sleep 3; plasma-desktop

Solve the problem ...

Any idea here to solve this definitively ?

Thanks,
-- 
Hervé Piedvache