Windows 7 chkdsk memory leak?

I was wondering if anyone else has noticed extremely high RAM usage when using windows 7's chkdsk.  I've used chkdsk on the same USB flash drive on my XP, vista, and 7 machines, and the memory usage is as follows:

xp : 20 - 30 MB (Depending on stage)
vista : 2.5MB
7 : about 25MB per second running (e.g. after chkdsk has been running for 10 seconds it will be using 250MB, after 2 minutes it will be using 3.0GB)

I am monitoring memory usage using task manager.  I actually have two machines running windows 7 7100 release candidate (x64) and the I noticed the problem on both.

The problem is easiest to duplicate if you run chkdsk on a drive other than your OS drive (so you can actually have task manager open while it runs as opposed to running after a reboot), and if you run a check that will take a long time.  chkdsk /f on a large hard drive works fine, or chkdsk /r on a smaller hard drive will work as well.  It doesn't seem to depend on which stage it is in - the memory usage balloons during stage 2 of a chkdsk /f on a (full) 1TB hard drive I have, and it happens during stage 4 of chkdsk /r on a half-full 32GB USB flash drive as well.

I would be interested to see if anyone else can duplicate this.