virtualbox.org

I am told that future versions of VirtualBox won't allow combining immutable VDIs and snapshots. Although I understand there are good reasons for this, it is something I currently use.

Apparently, the work-around for this has not yet been decided on. Maybe it could be posted here when it is?

Snapshots with immutable images not expected to work correctly

-- "VBox 3.1b1 known issues": http://forums.virtualbox.org/viewtopic. ... 59&start=0

Bit of a bummer.

VM states can now be restored from arbitrary snapshots instead of only the last one, and new snapshots can be taken from other snapshots as well (aka branched snapshots)

-- "VBox 3.1b1 released": http://forums.virtualbox.org/viewtopic.php?f=15&t=24458

However this allows a work-around as long as you're careful and never make changes you don't want to an un-snapshotted image/VM.