Just a couple of days I have had a pretty anoying experience regarding File Vault. I have been working on a virtual machine within Paralles, when all of a sudden the machine paused with a pop-up window. It said something about too less space left on the hard drive and I should delete some files in order to continue, or then switch off the virtual machine. Thus I started deleting some bigger files. But still same pop-up appears and by the way it told me the amount of space left on my hard drive, which did not change, even though I deleted few GB of data. Hence I had no option and had to shut down the virtual machine without being able to save my work I have had done so far. The problem here: File Vault does not free space before you log out. Right after logging in again, the disk space was deallocated and I was able to continue my work. Even though I only lost work of the last half an hour before that happening, it was pretty annoying anyway...
