I have been using custom panels for a long time now, so I know their workings, but recently every panel I add only carries the selected colour as a border and the fill is white. Instead of putting, for instance, a blue fill behind text, image, or whatever, I end up with a blue border about 5mm thick and nothing else. I'm using Firefox 32.0.3 on Windows 7. Not sure if this is a Firefox update issue, because it has only started in the last month or so. I can create backgrounds in CSS, but the widget is convenient and it is getting a bit annoying now. Any ideas?