Hotfire,
According to the latest report on ASIC site outstanding net shorts on PLA as at end of business 21/12/10 were;
14,226,403 out of 392,430,039 so 3.64% that is massive compared to before the unofficial strike when it was 5 to 6 million outstanding.
http://www.asic.gov.au/asic/asic.nsf/byheadline/Short+position+reports+table?openDocument