News At Seven-Thirty highlights: Concessionary bus fares will be discontinued; Two buses caught fire within an hour; unrest pressing Greek Prime Minister to step down; Tanker crew blamed for oil spill in South Korea; No beef recall in Ireland; Teenager sentenced for murder of domestic helper; Motion to scrap domestic helpers levy voted; More effective avian flu vaccine needed; Smoking ban will cover transport interchanges; Petitions in Beijing against government abuses; New Canadian Liberal Party chief.