I am having the same problem trying to install 3.3.3 MY host uses Apache 1.3.29 but it tells me in the sistem check that I need to have AcceptPathInfo set to ON.
The test is triggering on some installation paths, and we've been able to reproduce a couple of cases (fixed for the upcoming 3.3-4 release).
If you could provide us with the url you're using when installing eZ publish, and get the warning, it would be of great help. Replace domain names, etc. with other text if you wish.
I am installing it into the root directory of my site (shared hosting) on a server running Linux with Apache 1.3.29, MySQL 4.018 and php 3.4.3 The directory path on the server is /home/ensanch/public_html/ and the URL would be http://www.mydomain.org/ and the warning is:
2.AcceptPathInfo disabled
You need enable AcceptPathInfo in your Apache config file.
Check the Apache documentation, or enter the following into your httpd.conf file. AcceptPathInfo On