Yes, it must be the VM
I get the same bug

Karl

On Thu, May 7, 2015 at 7:47 PM, Tim Olson <tim.olson.mail at gmail.com> wrote:

> Update:
>
> I now think the problem is in the Cog VM:  I downloaded a clean image from
> Squeak.org and ran into the same problems (simply opening a Preferences
> Browser and clicking on the first item in the list will trigger a DNU).
>
> Running my current image with an older interpreter VM (Squeak 5.7.4.1)
> shows no problems.
>
>         — tim
>
>
>
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