Well shorts have gone from around 2.5% to 6.5% AFTER the SP was downgraded to the current levels. So their risk/reward profile is not a position many will find comfortable.
So 4% of issued shares is around 2.3M shares they will need to buy back in a hurry if an announcement goes the wrong way. Add to this the constant buying pressure of the company share buyback of $30M (around 2.1M shares at today's prices) and there's only one direction the shares will go over the next 2 months, imo.
p.s. I have been topping up over the last 2 weeks.