All Pictures are broken?

Hello!

I′m facing the problem that all my images in my blog are broken (since maybe 4 hours!).

I haven′t made any kind of changes in the folder where my blog is located “public.html/blog”. The only thing I did today was clicking on the .httaccess file of my normal homepage (not blog!), but I didn′t make ANY changes there! I also uploaded some pictures into another folder (not the /blog folder!), so I really can′t think if these actions could have resulted the problem with the broken images on my blog.

I′m able to view the pictures (when entering the direct URL to this picture that is saved in my media gallery / post), so there are no registrations, 404 errors, etc. I can view the picture.

I also read here on this forum that some members were told to delete a specific blog.php file in their directory (when upgrading to WP 3.0), but this message didn′t showed up for me, when I did the upgrade.
(PS: I also looked into my directory to see that I don′t even have a blog.php file in there..). Just an index.php file.

I read that I would have to add/replace the phrase:

wp-content/blogs.php?file=$2 [L]

But it doesn′t even excist in my .hattccess of my wp-blog.

Are the settings in my .hattces file correct?

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>

# END WordPress

I would be soo thankful for any kind of help, since I′m not able to solve this problem. I′m hopelessly lost at this moment.

PS: I′m using hostgator and cpanel.

Thanks a million!