anyway to set an image for deletion prior to node_save()

It seems I got the same problem:

In my field list (done with image fUpload), when I click the remove button to delete an image from my content, it disappears. But when I click on the Save Node button, my changes are not saved. I get the same node, as if I had done nothing.

If anyone knows where it can come from ?

thanks

not the same issue as i originally posted.. mine post was referring to programatticaly doing an img delete by setting something in the node object prior to running the command node_save()