progress bar (in indeterminate mode) is not clear on VISTA

JDK Info: PIT 6.0 b84

OS: Windows VISTA only

Steps to reproduce:
1) Install jre on windows VISTA
2) Launch any javawebstart application
Example: javaws http://java.sun.com/products/javawebstart/apps/mg.jnlp
3) Once the appln is launched, open java cache viewer (javaws -viewer)
4) Click on the application "Military App"
5) Click on delete Appln

Note that the progress bar (in indeterminate mode) is not clear. It's just a small dot moving from end to end.

[Progress bar from java cache viewer will be shown only when a single application is chosen for deletion or re-installation]

Snapshot attached: progress_bar.PNG