virtualbox-3-1-breaks-previous-vdi-sata-controller
VBoxManage - ERROR: Could not find ... 'SATA' or 'IDE...'
The answer is to run some esoteric commands to shoehorn into your new 3.1 xml the old config...
VBoxManage storagectl VM1 --name "IDE Controller" --add ide VBoxManage modifyvm VM1 --hda /home/user/.Virtualbox/HardDisks/VM1.vdi
VBoxManage storagectl VM1 --name --add SATA --controller IntelAhci
my solution,
rpm -e VirtualBox-3-1...
yum install VirtualBox
(this time it prompts me for VirtualBox 3.0.12)