VADP restore of thin/thick VM

Found interesting issue with NW (7.2.6.1 on Windows 2008 R2, backing VMware ESXi 5 build 768111):

have some VMWare machines, for which VADP backup fails to restore - see messages below:

Requesting 1 recover session(s) from server.

libDDBoost version: major: 2, minor: 4, patch: 1, engineering: 0, build: 289644

Successfully established client DDCL session

Disk handler for disk 2000 opened successfully

Warning top extent index reached maximum extent count

83342:nsrvadp_recover: Error writing to VMDK: 15024 bytes written instead of 65536 bytes.

Warning top extent index reached maximum extent count

83342:nsrvadp_recover: Error writing to VMDK: 11928 bytes written instead of 37888 bytes.

Warning top extent index reached maximum extent count

83342:nsrvadp_recover: Error writing to VMDK: 0 bytes written instead of 261632 bytes.

3:nsrvadp_recover: cannot write to C:\Windows\System32\config\SOFTWARE{6c2ecec9-e556-11e1-afcb-3440b581a646}.TMContainer00000000000000000002.regtrans-ms: No such file or directory

16294:nsrvadp_recover: Encountered an error recovering C:\Windows\System32\config\SOFTWARE{6c2ecec9-e556-11e1-afcb-3440b581a646}.TMContainer00000000000000000002.regtrans-ms

53363:nsrvadp_recover: Recover of rsid 32757 failed: Error receiving files from NSR server `backupsvr'

73724:nsrvadp_recover: One or more recover threads failed to exit successfully

Failed to recover files: Parent recover thread exited with errors

Restore of virtual machine failed!...

Completion time: 2012-08-20 16:04:57

Total time taken: 0 hr(s) 08 min(s) 19 sec(s)

I suspect it can have something to do with fact there are mixed thin/thick disks in VM (tested after converted to thick only disks and worked fine).

But it is not strict rule, as I have some thin/thick machines, and backup/restore works fine with those.

So I'm confused. Anybody seen such thing yet?