Perplexing .htaccess/PHP Conundrum

So... I finished a site on my local server, and I uploaded it to my remote server.

Going to the remote site yields an Internal Server error. I think there might be something wrong with the .htaccess file. Here's what it contains:

Options All -Indexes  
Options +FollowSymlinks  
DirectoryIndex launcher.php  
IndexIgnore */*  
RewriteEngine ON  
Rewrit开发者_高级运维eRule ^(.*)\.less$ $1.css.php [nc]  
RewriteRule ^([A-Za-z]+)$ launcher.php?page=$1 [QSA,L]

Eventually, I tried to debug the problem by adding # before the DirectoryIndex line to see what would happen. The result:

403 Forbidden

You don't have permission to access /site/ on this server.

Which is puzzling, because all the permissions seem to be ok... I double checked, the .htaccess file has octal 644.

What could be causing this issue? Thanks for any responses in advance.

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Thanks to the help SO users, my problem was solved.

Apparently, Apache freaks out if the .htaccess file has permissions set to write, so I was able to fix the problem by chmoding the entire directory and everything in it to 755.

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I had the same problem and as the error message says, the file mentioned was having permission 664. I just removed the write permission for group and the permission became 644. That fixed the error.