[SQU] some store error?

Hi.
        I'm using Squid Cache: Version 2.3.STABLE4

from cachemgr I got:

----
Store Directory #1: /w3cache/1
First level subdirectories: 16
Second level subdirectories: 256
Maximum Size: 8704000 KB
Current Size: 5058874 KB
Percent Used: 58.12%
Filemap bits in use: 220818 of 262144 (84%)
Filesystem Space in use: 2981927/8705501 KB (34%)
Filesystem Inodes in use: 172883/1044736 (17%)
Flags: SELECTED
----
why there is Percent Used: 58.12% while the filesystem use is 34%?
-- 
						Robert Milkowski
						milek@task.gda.pl
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