Hello.

I have uploaded SS to my server and after trying to run /install.php I got 500 server error. I figured out quickly that the problem is in the default .htaccess file namely in the mod_rewrite part of it:

<IfModule mod_rewrite.c>
              SetEnv HTTP_MOD_REWRITE On
	RewriteEngine On

	RewriteCond %{REQUEST_URI} ^(.*)$
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteRule .* sapphire/main.php?url=%1&%{QUERY_STRING} [L]
</IfModule>

Commenting the SetEnv line:

#        SetEnv HTTP_MOD_REWRITE On

fixed the problem but I still got error during the installation process:
Friendly URLs are not working. This is most likely because a rewrite module isn't configured correctly on your site. You may need to get your web host or server administrator to do this for you:

• mod_rewrite or other rewrite module is enabled on your web server
  
• AllowOverride All is set for the directory where SilverStripe is installed

More over after that the 500 server error appeared again!

It took me quiet a long time to find out the install.php script changes .htaccess file back to the default and I had to comment the SetEnv line in install.php createHtaccess() function. This solved the problem.

I am posting this here for two reasons

• because it may help someone with the simmilar problem.
• Don't you think that the automatic initialization of the .htaccess during the installation process is kind of a bug? The default .htaccess is present in the downloaded SS package so why to rewrite it again during installation?

the .htaccess is rewritten to update the RewriteBase rule.
For sites sitting in domain roots, this isn't an issue. However if you ever run SS out of a subdirectory, then it needs to be updated.

I've never had an issue with the setenv line before.
Infact I hadn't even realise it'd been added.