A strange problem with Aperture and Nik Plugins

Hi,
The problem I'm getting is that after editing an image in one of the Nik plugins, the modified image will not display properly when I press the zoom viewer button (the one that zooms to 100%).It looks fine at the normal size, but goes wrong when I zoom in. Strangely, there is no problem with the prints etc.
Anybody else experienced this?
I've attached a screen grab to show the problem.
Thanks
PS this was originally a color image!
The problem I'm getting is that after editing an image in one of the Nik plugins, the modified image will not display properly when I press the zoom viewer button (the one that zooms to 100%).It looks fine at the normal size, but goes wrong when I zoom in. Strangely, there is no problem with the prints etc.
Anybody else experienced this?
I've attached a screen grab to show the problem.
Thanks
PS this was originally a color image!
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