I myself soon will be migrating to Windows 7 away from my dual-boots of Vista and XP

This is the "JumpList" feature in action for Windows Media Player under Win 7...Would be really nice to see in Xnview MP too

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Also take a look at Paint.NET 3.51 which has stronger Win 7 support (directdraw), can you see the Win 7 like explorer bar and look at the appealing visual effect of the thumbnails just 'resting' on the far-right explorer-bar.

I ask could this be something that could be thought about in future to go attached above the tabs in the viewer of Xnview MP maybe?