BUG #11398: FATAL error on install, permission denied

The following bug has been logged on the website:

Bug reference: 11398
Logged by: Kathy Kaminski
Email address: kkaminski(at)vidsys(dot)com
PostgreSQL version: 9.0.16
Operating system: Windows 7
Description:

Installed PostGres 9.0.16 on Windows after a successful uninstall of 9.0.13
and had it fail with the following:

loading system objects' descriptions ... FATAL: could not access status of
transaction 0
DETAIL: Could not open file "pg_notify/0000": Permission denied.
child process exited with exit code 1
initdb: removing contents of data directory
"C:/ProgramData/PostgreSQL/9.0/data"

When this happened, they removed the postgres user (and we believe also the
data directory), re-ran the installer and that worked.

I'm trying to include postgres as a dependency in my installshield installer
and I'm concerned about encountering this in the field. Is it a known
problem? I can't find much by googling. What is the 'proper' way to handle
it when it comes up. Thanks :)