[SOLVED] Can no longer set height of header image after adding header widget

Today I added a header widget. After some testing I deleted the header widget, and removed it from the Atahualpa "Delete custom Widget Areas" and also from the "Configure Header Area." I verified that it's gone from the "Available Widgets" area. I've refreshed my browser's cache, logged in and out, deleted the cache folder, etc, but no matter what I do I can no longer control the height of the header image.

The actual image is 150 bytes tall, but I have the height set to 100 bytes in Atahualpa (have tried changing it to several values). No matter what I do the imaged displays as 150 bytes in the blog.

Of course I could just edit the header image to 100 bytes, but that's not really the point of my post. I'm trying to nail down what may be a bug. Any ideas?