problem while installitn PSQL 8.0 (win)

While installing both 8.0 beta, 5.o beta and RC1 everything
seems to go ok
until the following stage: Activating procedural languages, when the
installation stops. PostgreSQL server's service initializes
correctly. My OS
is Windows XP SP2. The reason why the situation appears is
that PostgreSQL 8
instllator does not copy some of the libaries to the system
catalogue of
windows. Any solutions???

Please see the FAQ on pginstaller.projects.postgresql.org, question 3.1.
Please note that I have just updated this FAQ with the following, which
may not be on the website yet:

There is also an issue if you have installed cygwin, and the cygwin\bin
directory is present in the system PATH variable. There are DLL files in
the cygwin directory related to interpreted languages (TCL, perl,
python) that contain bugs that can cause the installer or the installed
version of PostgreSQL to either hang or crash. Remove the cygwin\bin
directory from your path before running the installer!

Unless you have some further information on which libraries would be
missing? We have had no other reports of that...

//Magnus