weird empty dir

["user local" <local.usr@gmail.com>]

$ du -sh dir
5.2M    dir
$ cd dir
$ ls -altr
total 5236
drwxr-xr-x 6 user user 4096 2007-01-19 14:41 ..
drwxr-xr-x 2 user user 5345280 2007-12-01 11:12 .
$ cd
$ mkdir foo
$ ls -altr foo
drwxr-xr-x 72 user user 3800 2007-12-01 20:42 ..
drwxr-xr-x 2 user user 48 2007-12-01 20:42 .
$ du -sh foo
0    foo

Weird or not?



TIA
Stan Păpușă