Tested for 2.6.24-19: success.
For building I have been using 'sudo make -C /lib/modules/2.6.24-19-generic/build M=/usr/src/modules/ov51x-jpeg modules' (not module-assistant).
Tested for 2.6.24-19: success.
For building I have been using 'sudo make -C /lib/modules/ 2.6.24- 19-generic/ build M=/usr/ src/modules/ ov51x-jpeg modules' (not module-assistant).