diff --git a/doc/INSTALL2 b/doc/INSTALL2
index a53a945..2296025 100644
--- a/doc/INSTALL2
+++ b/doc/INSTALL2
@@ -22,6 +22,15 @@
 accounting data. Otherwise, this could lead to VMs running but not known 
 to the nodemanager.
 
+If you are using Qemu/KVM as the hypervisor, be advised that the VM 
+format changes rather quickly. E.g. version 1.1 of Qemu states it will 
+accept migrations in from versions 0.13 to 1.1. Migrations out are 
+liable to be dropped on the floor by a receiving older version Qemu 
+(with a successful return from the sending Qemu). Be careful to only 
+deploy Qemu versions in your cluster that can work together. Since 
+suspend and resume are handled via the same mechanisms, the above caveat 
+applies to these actions too.
+
 ---+ Deployment over multiple networks
 
 To add additional networks to the Apache Tashi cluster, they should be