Thumbnail Oddity with external generator

I am using the (now debugged) ROM Properties extension that can also provide thumbnail images to known ROMs. This works fine in Explorer, but somehow DOpus decides that for SOME items it rather shows a different thumbnail with the small overlay in the corner. (Black background Explorer, white background DOpus). I have tried to find a pattern in filenames, I have deleted both thumbs.db and the Opus thumbnail cache, but I always end up with this odd display. Any ideas?


The Text File Thumbnails plugin is handling some of the files. They must contain mainly text data at the start.

If you go to the plugin’s configuration (Preferences / Viewer / Viewer Plugins) you can tell it not to handle the .gb extension to fix things.

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