My apologies for an incomplete bug report; I worked around the problem
before recording key information, and I am unable to repeat it.
Essentially, while upgrading my Red Hat 6.2 installation to the Pinstripe
beta, I left my computer during the RPM installs, and returned to find
that it had stalled on one of the kde packages. Switching VTs to the bash
prompt, I discovered that the program "desktopconv", running under my most-
often used non-root user ID, was taking 98% CPU time and generating
intermittent bursts of hard drive activity. Killing that PID caused the
installation to resume immediately.
After the upgrade, my home directory now includes (all real directories, not
continuing probably out to MAX_PATH.