Failed Custom Header upload

I can't seem to find an answer on the forums to the following situation:

I cropped my image after clicking on upload to header (currently BP Twenty-Ten theme). The first attempt, the image did not display as desired. It did, however, appear in the header. I clicked on the remove button and on the admin Custom Header page under uploaded images the field was filled with black. I tried again to upload an image, cropped as directed and another bar filled with black. I clicked remove again and the default on my site was restored, but I now have four uploaded image fields filled with black.

Please direct me. Thanks!