Uploader is not removing files on parent object destroy

[Chris Bloom]

I have 4 CW uploaders in my system. One particular uploader is not properly removing the associated images when the parent object is destroyed. Other than the store_dir setting and slightly different size constraints, the uploaders are identical. The mount_uploader on each model is just your basic "attribute, uploader" syntax. I can confirm that the files are being stored, and that the object runs through it's destroy sequence properly (i.e. I can see that both the before_destroy and after_destroy callbacks have been triggered), but the images remain. Again, it's only this one uploader - the other three work as expected. This is happening with both a local file store and a remote Cloud File store.

Is there a way to debug what's going on in CW? What else should I be checking?