What to do when landlords are harassing & leaving threatning messages?

We submitted out 30 day notice on the 11th of this month. We have always had a great relationship renting from them our landlords for nearly 2 years. They gave our new landlords a great reference and claimed they would rent to us again anytime. (The old landlords are private homeowners). We have paid rent at the old house until 7/1/11. He told us he would be showing the house to a couple of interested tenants the next evening. We let him know that we are still in the middle of moving so it is pretty messy (still have some of our things in there) and haven't gotten a chance to make the necessary repairs & clean since we had until the 1st of July. He understood and told us it was no problem. The next day he left us a voicemail saying he was going to "hang us and our daddies". In the voicemail he also stated that we "destroyed his brand new house." (Built a little over 7 years ago). The repairs we told him we needed to make consist of the following: 3 Cracked light plate covers, 3 holes in the walls (one caused by a door knob without a stopper), 1 drawer COVER in the kitchen that fell off due to the screws coming lose (the sliding system is still fully intact), shampooing the carpet and touching up the paint. I got a call from our new landlords today saying that they received a call from our previous landlord who had initially given us a great reference. He told them that we destroyed his house and trashed it and he would be suing us from anywhere between $5,000-$10,000 to cover the damage done. Because we still have the house until the 1st of July, can he threaten us without allowing us to make the necessary repairs/clean per our rental agreement? Is he allowed to call our current landlord and tell her what's going on? I'm lost right now and don't know what to do. I've walked through the house and taken pictures of everything.