problem: 500 internal server error at the site

[eluser]Aken[/eluser]
First, remove the first RewriteCond line. The next two are sufficient.

Second, try removing the "Options +FollowSymLinks" and "AddDefaultCharset UTF-8" lines (or comment them out by putting # at the start of the line) and see if those changes fix your problem. If they do, one of those lines if probably causing the error. If not, then its possible you don't have mod_rewrite or other components necessary.