Disk space used by OS X guest VM. Large difference when checked by various methods

Questions to those of you using PD for Mac to virtualize OS X.

Has anyone else noticed big discrepancies in disk space used by VM when reported by different means and inability to "reclaim disk space"?

For example, when I boot SnowLeoServer VM, Finder in VM reports that total disk space used is slightly under 6 GB.

In Parallels VM properties, "Total Size" is 12.5 GB.

Finder in host OS X reports that the VM file is 13.3 GB.

Parallels is also not able to reclaim any disk space from this VM.

So once again, is it just me or is this normal for this kind of Host/Guest combo?

 

Turns out that installing trial of the latest PD10 fixes this problem, allowing to reclaim disk space and actually reduce VM size from 13+ gb to 6+ gb