>>>>> In <v9ll2gy6jw.fsf@marauder.physik.uni-ulm.de> Reiner Steib wrote:

> I worked for my test cases.  Please install.

Done.

> There is still the problem (probably with `gnus-article-goto-part';
> unrelated to your code), that using `d' repeatedly in a message with
> several attachments sometimes fails to advance to the next part (with
> `gnus-auto-select-part' set to 1).

If you're talking about the case where there are not only
buttonized parts but also unbuttonized parts in the article,
does the following patch solve it?