major class action group forming, page-8

I think this sums it up...

http://www.smh.com.au/business/sigma-writedowns-shock-shareholders-20100331-rf18.html

The red ink took attention away from Sigma's operational results, with underlying earnings before interest, tax, depreciation and amortisation down 9.4 per cent to $213 million, on revenue that rose 4.5 per cent to $3.22 billion.

Mr de Alwis said the Sigma business remained sound. "I'm a shareholder in Sigma as well and I'm very confident that Sigma is a strong company . . . what has happened is disappointing, unfortunate, but it doesn't take away from the fact the company is performing well."