The simple answer on the new debenture is that it is being issued to replace the cash the company paid out a short time ago when the payment on the former debenture came due; on account of the poor share price in our depressed markets, most debenture holders opted for cash instead of taking their payment in shares as would normally have been expected. This depleted the company's cash-on-hand by a number of millions of dollars (I think the number was around $7 million - someone can confirm whether this is correct). This new debenture replaces that money with a little extra.
NLion