ms windows: 40% space taken double by ../pg_tblspc folder?

Hi,

Tablespaces are implemented as some sort of a hard link on windows, so that
the data seem to be in the program files, but they're not.
When i look at my C drive with spacemonger though, it tells me that the data
in the tablespace IS in the program files folder - it is "fooled" by the
hard link.
That's no big problem, but it seems that Windows itself is fooled too. The
space left on my C drive is not correct, i'm missing some space.
It's not quite as much as the size of the tablespace. 4 GiB of space is
missing on the C drive, the tablespace is 10 GiB.
- "Missing" means: when i calculate the sum of the file sizes, except the
ones in C:\ProgramFiles\PostgreSQL\8.3\data\pg_tblspc\ , there should be 24
GiB Free, but DIR and all the dialogs say that there are only 20 GiB free.
If the whole space for ../pg_tblspc were taken double, there would be only
14 GiB free.
- The command used was C:\>dir /a /s /-c > c.txt
- There are minor diferences between dir *, dir *.* and dir without an
asterix (surprisingly *.* gets the most)
- The difference is not explained by the "size on disk" vs "filesize" (DIR
gives the filesize, but the difference is less than 1 GiB)
- The filesize sum in the properties dialog of Program files does NOT
include the tablespace files
What happens when the size of the tablespace surpasses the space that is
left on my C drive? Windows might find that the disc is full (even though it
isn't), and writing to it would be impossible.

Anyone know more about this?

Thx,

WBL
--
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because you were born in it." - George Bernard Shaw