Contrib "Image Attach" ignores uploaded image, can't be removed or reset

Hi,

the contributed "Image Attach" module does not work for me on D6. If I choose an existing image for a term in /admin/content/taxonomy/taxonomy_image ("Use existing image") and save the settings, these settings are ignored and no image is displayed. After saving, the module reports:

I can reproduce this behaviour with different images, image sizes, and Imagecache presets. Basically, the attaching never works.

Additionally, the not-used image can not be "removed" or reset to "default" setting; that means, that if I want "Recursive image display" (Enabled at /admin/settings/taxonomy_image and working on taxonomy image terms), I can not get this recursive image after I tried once to upload an image with "Taxonomy Image Attach" - meaning that I loose consistency I'm trying to gain through recursive images (which makes the module more or less useless for me).

"Taxonomy Image - Taxonomy Image" is configured as follows:

* Allow selection of existing image node images to use as taxonomy_images [checked]
* Allow selection of image derivative sizes [checked]
* Default image attach size: flag (this is an operational Imagecache preset; Imagecahce is enabled and operational)

The site has approx. 29k nodes and a few thousend terms; maybe this module does not scale properly for more than a few dozend terms? At least the loading times for /admin/content/taxonomy/taxonomy_image are very annoying (all terms from all vocabularies are loaded on one single page)