Platform
Win32

JDK Build
JDK 1.4.1_02
java version "1.4.1_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_02-b06)
Java HotSpot(TM) Client VM (build 1.4.1_02-b06, mixed mode)
Note:
The same bugs also exist with hopper fcs build

Descriptions:
On one hand, installshield complained that
"not sufficient diskspace for installation"
On the other hand, installshield reported that
Space Required on D: 69332K
Space Available on D: 137670K
    which show
"Space Available" > "Space Required"

How to reproduce
1. get j2sdk-1_4_1_02-windows-i586.exe bundle from
   /net/koori.sfbay/p/v10/jdk/1.4.1_02/fcs/b06/bundles
2. double click that bundle to launch installation
3. On the screen of "Select Component", you will see
Space Required on D: 69332K
Space Available on D: 137670K
   which show that have enough disks pace for installation.
4. click "next" button
5. a new dialog box will pop up to complain that
   "You do not have enough space on the Drive D:"