Excluding path from redirection

I have a strange problem.
I use a tiny graphics in my forumhome. It is located in /ubar/

I set up vbSEO to exclude ^ubar/

The result is: /ubar/ubar.txt is shown.
/ubar/ubar.png results in Page "not found"

Check yourself:
http://forum.computerbetrug.de/ubar/ubar.png
http://forum.computerbetrug.de/ubar/ubar.txt

I don't have a clue what goes wrong here...

Hello,

Is that file in fact existing though?

Yes, it is.
There was no problem until I installed vbSEO. From this moment on it was gone.

Does it work correctly if you temporarily remove/rename .htaccess?

Very nice without redirection.

BTW: I use lighthttpd as webserver.

I got a solution: I added the folder to the redirection rules (the added text is bold):

"^(/(admincp|modcp|clientscript|cpstyles|images|custom avatars|ubar)/.*)$" => "$1",

I don't know if this is the best solution, but it finally works...

Yes, that's correct.