.htaccess file in use on an EE website with HTML5 markup and versioned static assets.

.htaccess

# === ENABLE mod_rewrite =========================================

RewriteEngine on

# === SECURITY TWEAKS ============================================

# --- Stop malicious visitors from viewing -------
# --- your .htaccess rules in the browser. -------

<Files .htaccess>
  order allow,deny
  deny from all
</Files>

# === PERFORMANCE TWEAKS =========================================

# --- Set far future Expires header --------------

<FilesMatch "\.(gif|png|jpg|js|css|swf)$">
  ExpiresActive On
  ExpiresDefault "access plus 10 years"
</FilesMatch>

# --- Disable ETags ------------------------------

Header unset ETag
FileETag None

# --- Serve font files gzipped -------------------

Addtype font/otf .otf
Addtype font/eot .eot
Addtype font/woff .woff
Addtype font/ttf .ttf
Addtype font/svg .svg
AddOutputFilterByType DEFLATE font/otf font/eot font/woff font/ttf font/svg
Header append Vary Accept-Encoding

# --- Rewrite versioned static images ------------

RewriteRule ^(images/site_image_assets/)(.+)\.(.+)\.(jpg|gif|png)$ $1/$2.$4 [L]

# --- Serving your HTML as HTML5? ----------------
# --- Take care of FF2 and older Gecko-based -----
# --- browsers that get confused -----------------

RewriteCond %{REQUEST_URI} \.html$
RewriteCond %{HTTP_USER_AGENT} rv:1\.(([1-8]|9pre|9a|9b[0-4])\.[0-9.]+).*Gecko
RewriteRule .* - [T=application/xhtml+xml]

# === EXPRESSIONENGINE TWEAKS ====================================

# --- Remove index.php from URLs -----------------
# --- Exclude List method ------------------------

RewriteCond $1 !^(images|system|themes|favicon\.ico|robots\.txt|index\.php) [NC]
RewriteRule ^(.*)$ /index.php/$1 [L]