Using keyboard shortcut with laptop (wihtout numpad) doesn't work correctly

Hi,
I'm using MuseScore: Music Score Editor; Version 0.9.6.3; Build 3507 on kubuntu 10.10 with kde4.5.1

The problem is I can't use shortcut for tuplets with my laptop, because I need to presse the SHITFT or CAPLOCK key to have number and the normal shortcut is without SHIFT.
For example :
I want to put some sextuplet of sixteenths notes, so I select the first note (which is a sixteenth note) and the I should press ctrl+6 to have my sextuplet.
BUT, I work on a laptop, without numeric pad, so to have the 6, I must do SHIFT+6 or CAPLOCK+6, which transform the shortcut in ctrl+shift+6 instead of ctrl+6, and musescore doesn't recognize this !
I've tried to modify shortcut in the preferences settings, I replace ctrl+6 by ctrl+shift+6, but it doesn't work !!
I've restart musescore twice to be sure preferences have been well saved.
Any workaround for this problem ??