I had on Mac Lion OS X just 0.5GB of free space, so I deleted like 15 GB movies => OS X wanted to confirm this operation by filling out the password => I did it and the files were deleted.
I checked again the free space on disk and there is still 0.5GB. I have tried to restart system, but nothing has changed => still 0.5GB of free space.
The thrash is empty. What is wrong with Lion OS X? I have Macbook Pro.