Keyboard Shortcut for Adding Sharps and Flats Needs to be Pressed Twice

When I'm typing in notes, and I would like to sharp a note, the first note will change when I press the key. However, if I were to keep typing in notes, any more notes that I would like to sharp will require me to press the keyboard shortcut twice for the note to change. The same applies to flats. The first flat will work on the first keystroke, but flats thereafter will require two strokes.

I uploaded a video demonstrating the behavior. Notice that the flat/sharp buttons at the top bulge on the first keystroke, then the second keystroke applies the accidental.

http://dl.getdropbox.com/u/373797/sharpflats.ogv

Ubuntu 9.04
Musescore 0.9.5RC2