Georgia has just announced that parliamentary elections will be held on 1 October. They are being seen as the biggest test facing the country's democracy since the Rose Revolution in 2003.

Until the end of last year it looked like President Mikheil Saakashvili's governing party would win this election easily. A boringly predictable affair - welcome in a country where elections can provoke crisis and instability.

But now the volatility is back in Georgian politics.

The country's richest man, Billionaire tycoon Bidzina Ivanishvili, whose $6.4bn (£4.1bn) fortune is worth almost half Georgia's economic output, has vowed to oust the ruling party from power. And the fight is getting nasty.