I installed it fine. Didn't know what to do after but I got the first page up and running.
I changed these lines in lib/config.php
Line 50: $WhichDatabase = 'mysql';
Line 111: $mysql_server = 'db.domain.com';
// username as used in step 2 of INSTALL.mysql:
$mysql_user = '';
// password of above user (or leave blank if none):
$mysql_pwd = '';
// name of the mysql database
// (this used to default to 'wiki' prior to phpwiki-1.2.2)
$mysql_db = '';
Seems to want to use cgi bin, even if I'm using a database.
I created my database using the supplied schema in schema/schema.mysql