In 4.1 there is new feature that as I see was not mentioned anywhere.
The saved state file (*.sav) is no longer an uuid and multiple snapshots can refer to single sav file.
It improves used space and time needed for snapshot take is some situations, e.g. when one want to take snapshot of current "Saved" state.
But there are some bugs in this too (host WinXP SP3 x86, Vbox 4.1b3):
1. When deleting machine (removing all files) with have "shared" saved state I get
Code: Select all
Failed to remove the virtual machine <VM name>.
Medium '<Path to disk image>' is locked for reading by another task.
Details
Result Code: VBOX_E_INVALID_OBJECT_STATE (0x80BB0007)
Component: Medium
Interface: IMedium {53f9cc0c-e0fd-40a5-a404-a7a5272082cd}