Interference with image module (image gallery actually)

Quoting the referenced issue:

There is a problem when both modules are turned on and the option "show the current term in breadcrumb" is also on. The image gallery uses a different way of showing its contents, not using the regular term/x url but using image/tid/x. So the breadcrumbs don't work for image galleries, they show a list of images (just the name), without showing an image preview.
You could think of it as if the image gallery is shown in "bare taxonomy term" view.

I think the answer is to patch the image module somewhere in the menu callback function for image/tid/x, do the following:
if the taxonomy_breadcrumb module is enabled. If true execute:

  $breadcrumb = taxonomy_breadcrumb_generate_breadcrumb($tid, TRUE);
  drupal_set_breadcrumb($breadcrumb);

where $tid is the term-id of the lightest term of the lightest vocab of the image

I don't think it's a good idea to add code specifically for the taxonomy breadcrumb module...

Agreed.