I just upgraded an ancient installation of EE 1.5.2 to 1.6.8 and am now failing to get any output whatsoever.
The main page serves blank, /master/ (the renamed system directory) spits out Error 403 Directory Access Is Forbidden. It is also giving me the same error message on other EE-specific directories like /images/. I diligently went back to check that all my file permissions are set at 644, that directories are 755, and that /system/cache/ is 777. The install had the usual rewrite conditions removing index.php in htaccess, I have completely removed the whole file and still no luck. This is the same host, the same directory, no migration whatsoever. What is going on?
PS: EE successfully updated incrementally from 1.5.2 to 1.6, then each point upgrade thereafter. Update appears to believe it completed successfully.