'old on tight We spotted a sign at the Gold and Silver Exchange yesterday warning people over 65 to stay off the trading floor, on the grounds that it is a vigorous activity with lots of shoving and bumping that can easily lead to injury. Who knew? Lest you think the exchange guilty of egregious age discrimination, it should be noted that it does not bar senior traders from partaking in the fray. But it does absolve itself of any injuries that may occur. LUCKY NO3 Hutchison is holding its second Hong Kong 3G launch event in four days at 3.15 this afternoon after unveiling some of its new handsets to the public at the same time on Saturday. The time - saam dim saam in Cantonese or 'three-point-three' - has been chosen for obviously superstitious reasons. With US$16.7 billion sunk into its global 3G networks, Hutchison apparently needs all the help it can get. wing tips Property stocks were up yesterday, ostensibly on reports of better than expected holiday sales. But we can think of a more imaginative justification. With chicken flu spreading through the region and speculation that the disease is borne by migrating birds, could it be that developers finally have the perfect excuse to pave over Hong Kong's most famous nesting ground - the Mai Po Nature Reserve?