Absolutely. We will all be claiming our capital losses this...

Absolutely. We will all be claiming our capital losses this year. The ATO will probably get a shock when they see mine, haha.

I believe that any resulting settlement from a class action relating to loss of shares is treated as a separate event for capital gains purposes. If you have no carry forward losses to offset it with then you'd pay the CGT on it in the year that the settlement occurs. If you still have carry forward losses then the settlement would just reduce the amount of your carry forward loss.