The fix is Bug #355998 in Ubuntu 9.04 (edited):

sudo apt-get install build-essential devscripts
sudo apt-get build-dep libgphoto2
sudo apt-get source libgphoto2
wget http://launchpadlibrarian.net/25783305/libgphoto_sansa.diff
patch -p0 -i libgphoto_sansa.diff
cd libgphoto2-2.4.2
debuild -uc -us
cd ..
sudo dpkg -i libgphoto2-2_2.4.2-0ubuntu4_i386.deb