Oddly enough, it will display anything in between, if you specify an existing blog as param:
http://www.tilqi.com/blablabla/anythinghere/blog1.php?blog=6&disp=user

Is that a bug or something ?

It looks like a standard Apache behavior, not sure though. Rename your .htaccess and see what happens.

Yup, renaming htaccess caused a 404.

But my htaccess is pretty straight-forward, i wonder what it causes it, and if there are other crazy urls like that

# Apache configuration for the blog folder
# Lines starting with # are considered as comments.

# PHP SECURITY:
# this will make register globals off in the evo directory
<IfModule mod_php4.c>
php_flag register_globals off
</IfModule>
<IfModule mod_php5.c>
php_flag register_globals off
</IfModule>

# PHP5
# This may need to be in each folder:
# AddHandler application/x-httpd-php5 .php

# CLEAN URLS:
# If you're using Apache 2, you may wish to try this if clean URLs don't work:
# AcceptPathInfo On

# DEFAULT DOCUMENT TO DISPLAY:
# this will select the default blog template to be displayed
# if the URL is just .../blogs/
<IfModule mod_dir.c>
DirectoryIndex index.php index.html
</IfModule>

# CATCH EVERYTHING INTO B2EVO:
# The following will allow you to have a blog running right off the site root,
# using index.php as a stub but not showing it in the URLs.
# This will add support for URLs like: http://example.com/2006/08/29/post-title
<IfModule mod_rewrite.c>
RewriteEngine On

# This line may be needed or not.
# enabling this would prevent running ina subdir like /blog/index.php
# This has been disabled in v 4.0.0-alpha. Please let us know if you find it needs to be enabled.
# RewriteBase /

# Redirect anything that's not an existing directory or file to index.php:
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php
</IfModule>
<IfModule mod_expires.c>
ExpiresActive On

# images
ExpiresByType image/png "access plus 6 month"
ExpiresByType image/gif "access plus 6 month"
ExpiresByType image/jpeg "access plus 6 month"
ExpiresByType image/x-icon "access 1 year"

# css and javascript
ExpiresByType text/css "access plus 2 months"
ExpiresByType application/javascript "access plus 2 months"
ExpiresByType text/javascript "access plus 2 months"
</IfModule>

RewriteCond %{HTTP_HOST} ^tilqi\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.tilqi\.com$
RewriteRule ^ozlusozler\.php$ "http\:\/\/ozlusozler\.tilqi\.com\/" [R=301,L]

@sam2kb wrote:

Oddly enough, it will display anything in between, if you specify an existing blog as param:
http://www.tilqi.com/blablabla/anythinghere/blog1.php?blog=6&amp;disp=user

Is that a bug or something ?

It looks like a standard Apache behavior, not sure though. Rename your .htaccess and see what happens.

This is how the rules should be organized. It will not fix the problem though.

# CATCH EVERYTHING INTO B2EVO:
# The following will allow you to have a blog running right off the site root,
# using index.php as a stub but not showing it in the URLs.
# This will add support for URLs like: http://example.com/2006/08/29/post-title
<IfModule mod_rewrite.c>
RewriteEngine On

# This line may be needed or not.
# enabling this would prevent running ina subdir like /blog/index.php
# This has been disabled in v 4.0.0-alpha. Please let us know if you find it needs to be enabled.
# RewriteBase /

RewriteCond %{HTTP_HOST} ^tilqi\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.tilqi\.com$
RewriteRule ^ozlusozler\.php$ "http\:\/\/ozlusozler\.tilqi\.com\/" [R=301,L]

# Redirect anything that's not an existing directory or file to index.php:
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php
</IfModule>