Clean URLs dont work in Image Paths

I see the following in the serverlog:

... "GET /image/view/20/_original HTTP/1.1" 200 105209 ...
... "GET /image/view/blick-auf-meran-2000-von-irgendwo-zwischen-der-voeraner-alm-und-hafling/_original HTTP/1.1" 200 5 ...

Wenn using the node-id the server delivers the picture bytes with an OK status code.
When using the path-alias the server delivers 5 bytes with an OK status code.

Nobody?

I can give more feedback if needed.

Drupal 5.1
Configuration file Protected
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File system Writable (public download method)
GD library bundled (2.0.28 compatible)
Module update status Up to date
MySQL database 5.0.26
PHP 5.2.1
Unicode library PHP Mbstring Extension
Web server Apache/1.3.33 (Unix)

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Textimage Up to date 5.x-1.2 5.x-1.2 (2007-Feb-06) textimage-5.x-1.2.tar.gz
Includes: Text Image
Update status Up to date 5.x-1.2 5.x-1.2 (2007-Apr-14) update_status-5.x-1.2.tar.gz

More needed?

I really dont know anything about the internals. I am just a user of drupal as for now.

img src="/image/view/20/thumbnail"

Puts out the thumbnail as expected, but

img src="/image/view/blick-auf-meran-2000-von-irgendwo-zwischen-der-voeraner-alm-und-hafling/thumbnail"

does not.

/blick-auf-meran-2000-von-irgendwo-zwischen-der-voeraner-alm-und-hafling

is equivalent to

/node/20

via pathalias.

Thats all i know.

Why not extend "image" that it can use path aliases also?

Thanks for you help anyway.