Please open source your code. My friend used this extension and it permanently changed how images rendered on several sites, even after the extension was disabled and then removed. I was able to reproduce the issue, and I spent a lot of time trying to figure out what your extension had done that caused that. In the end, all we could do was reset opera to its default state. If I had access to your source code, I might've been able to solve this easier and more accurately, without wiping out any of his settings.