After installing wordpress 3.2 with installatron in Plesk Panel, your wordpress website is not showing when you surf to the website. In my case, the default Plesk page was still showing. The wordpress admin panel at wp-admin.php does work.
In my case, the default Plesk page was an index.html file in the root folder. Since this file preceded the index.php file that wordpress uses, simply renaming the index.html file to index-old.html solved the problem. Deleting index.html also does the trick.