or at least that's what pingdom says, and i think it's a pretty reliable service,
Notes:
htaccess:
#Gzip
<ifmodule mod_deflate.c>
AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x- javascript application/javascript
</ifmodule>
#End Gzip
# 480 weeks
<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|css|swf)$">
Header set Cache-Control "max-age=290304000, public"
</FilesMatch>
# 1 weeks
<FilesMatch "\.(js)$">
Header set Cache-Control "max-age=604800, public"
</FilesMatch>
RewriteEngine On
ErrorDocument 500 /oohps.php
ErrorDocument 404 /where.php
RewriteCond %{HTTP_HOST} ^www.keepyourlinks.com [NC]
RewriteRule ^(.*)$ http://keepyourlinks.com/$1 [L,R=301]
RewriteCond %{HTTP_HOST} ^www.keepyourlinks.byethost32.com [NC]
RewriteRule ^(.*)$ http://keepyourlinks.com/$1 [L,R=301]
RewriteCond %{HTTP_HOST} ^keepyourlinks.byethost32.com [NC]
RewriteRule ^(.*)$ http://keepyourlinks.com/$1 [L,R=301]
RewriteCond %{HTTP_HOST} ^keepyourlinks.com/pre/ [NC]
RewriteRule ^(.*)$ http://keepyourlinks.com/$1 [L,R=301]
RewriteCond %{HTTP_HOST} ^piscolabis.info$
RewriteCond %{REQUEST_URI} ^/keepyourlinks.com [NC]
RewriteRule ^(.*)$ http://keepyourlinks.com/$1 [L,R=301]
#Webs Sueltas
RewriteRule ^facebook-likes$ fbmate.html
RewriteRule ^api_webmasters$ API.php
#Options +FollowSymLinks
RewriteBase /
RewriteRule ^keep/(.+)/(.+) link1.php?id=$1
RewriteRule ^article/(.+)/(.+) ?tipo=questions&que=view&id=$1
RewriteRule ^file/(.+)/(.+) ?tipo=files&que=view&id=$1
RewriteRule ^user/(.+)/(.+) ?que=usuario&id=$1
RewriteRule ^categories/(.+)/(.+) listarenlaces.php?id=$1
I am just looking for possible causes
Has nothing to do with your .htaccess
Perused your site code. You've got this little bit in your "Last Activity" section:
<img src="http://keepyourlinks.com/" width="30" height="30"/>
... you're loading your whole page again in an image tag.
More context, to help you find where it's being generated:
<div class="comentario">
<a href="http://keepyourlinks.com/user/736/laroma">
<img src="http://keepyourlinks.com/" width="30" height="30"/> laroma
</a>
<span class="suave"> ha comentado </span>
<a href="http://keepyourlinks.com/keep/186577/deshidratacion">deshidratacion</a>
<span class="fecha"> 72 dias:</span>
<p>
La deshidratación es la pérdida excesiva de agua respecto al agua que se ingiere. El European Hydration Institute (EHI) es una fundación creada con el fin de avanzar y profundizar en el conocimiento acerca de la hidratación humana y sus efectos sobre la salud, el bienestar y el rendimiento físico y cognitivo.
</p>
</div>