User:Dr Brains/common.css

Note: After saving, you have to bypass your browser's cache to see the changes. Internet Explorer: press Ctrl-F5, Mozilla: hold down Shift while clicking Reload (or press Ctrl-Shift-R), Opera/Konqueror: press F5, Safari: hold down Shift + Alt while clicking Reload, Chrome: hold down Shift while clicking Reload.

The accompanying .js page for this skin is at User:Dr Brains/common.js.

#mw-upload-thumbnail canvas {
  background: url("//upload.wikimedia.org/wikipedia/commons/5/5d/Checker-16x16.png") repeat scroll 0% 0% transparent;
}