Installing CiviCRM 4.6.10 on WordPress 4.3.1, with few, if any other plugins installed. After uploading the files and enabling the plugin, you go to the installer page, and it's a white screen. Nothing's appearing in the logs.
Debugging in the code shows that everything executes fine until set_include_path() gets called. Commenting out the first instance causes it to proceed until the next instance. Finally, after commenting out several, you get an error that a class is not found, which is not surprising: you've removed the places that tell the script where to find it.
Standard cPanel-driven LAMP stack from InMotion hosting.
Why would this installation fail?