New installs do not show initial setup progress/details on Windows platforms

Environment: Windows XP SP3
Tomcat 6.0.24
Firefox 3.6.10

When doing a "clean" install of OpenMRS 1.7.0 RC1 and the latest nightly build (as of 13 October 2010) the following problem occurs:

After going through the various prompts on the initialsetup wizard, and kicking off the process, the status information hangs at 0% for one or two minutes, appearing as though nothing is happening. In reality, things are proceeding normally, just without any indication. After a couple minutes, at the end of the setup, 0% becomes approx. 623 items completed and the process is essentially finished.

In 1.8 trunk, the progress bar/check marks appear blank until the same time, and upon clicking on "show details" the same 0% status is shown as appears in 1.7.0 RC1.