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[eluser]BrianDHall[/eluser]
You might also try this out on a regular image you upload with hard-coded address, and maybe you can whittle-down where the problem is a bit better.

From the manual it recommends:

Code:

if ( ! $this->image_lib->resize())
{
    echo $this->image_lib->display_errors();
}

...to display errors.