Where did you hear this, Silvertop? I have conducted searches in English and Spanish and all I could find relates to a news item back in August, when it was reported that Nadalsol had stopped work on an old people's home in Malaga until 2009, if market conditions improve. There appears to be nothing about "voluntary liquidation". Please provide source, because if there is any truth in this, then it's time to check bank guarantees.
I hope PPM posts a clarifying statement soon.
As for the rumour about the bank guarantee, I very much doubt that this can be withdrawn from the deal. In Spain what developers advertise becomes part of the contract and is, therefore, legally binding.