Adding one Content Taxonomy reference removes all Core taxonomy terms

Hi,

I'm having major problems with this module: When adding one Content Taxonomy reference, it removes all Core taxonomy terms from the node.

Content taxonomy is set up as a CCK field type with the "Select List" widget; the field references a sub-category from one vocabulary, under "Specify terms to show" the vocabulary is as well selected as the sub-category.

The behaviour described above occurs as well if setting "Save options" in "Data Settings" to "Save as tag" as if setting to "Both"; only "Save in cck table" seems to work fine.

I'm setting this issue to "critical" because the module breaks core taxonomy and causes data loss.

Any ideas?

Thanks & greetings, -asb