Losing Disk Space after running CCleaner

CCleaner for Windows CCleaner Windows Bug Reporting
1

Everytime after running CCleaner I always seem to lose disk space,but it's supposed to clear free space right? I check my computer hard drive and it continously lowers the space,but after uninstalling a program or little file it will go back up but does it everytime after I run CCleaner again. Any ideas why?

2

Always helps if you list your operating system, xp or vista etc.

Build of ccleaner used.

Also what kind of amount are we talking here?

3
Always helps if you list your operating system, xp or vista etc.

Build of ccleaner used.

Also what kind of amount are we talking here?

windows vista home premium 32 bit edition

the latest ccleaner version right now : v2.17.853

4

Can you monitor your sys restore points, they are notoriously large in Vista, and apparently include some user files?

5

Can you monitor your sys restore points, they are notoriously large in Vista, and apparently include some user files?
Yes I can ;) when I run the Mcafee cleaner it does not lose disk space but actually frees some?