Since i still couldn't launch my KSnapshot, i assigned a new global shortcut at the Input actions. This can be done at System Settings > Keyboard & Mouse > Input Actions
How to assign a shortcut in Input Actions?
1) Right click on the KMenuEdit and choose New Global Shortcut > KMenu entry.
2) Assign a name/term, trigger the shortcut (Print) and set the action (ksnapshot -caption "%c").
For example :

It works...
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Thanks, I was tired of opening ksnapshot with alt+f2 everytime I need an screenshot on kubuntu 9.04. This used to work right after install on previous versions, I do not know why it changed... :-|
Francisco Marzoa
http://marzoa.com/