I ran into this when trying to use the amazing debug() in the sage
notebook on a particularly shallow traceback. However, the problem
seems to be for interact sliders in general. This is on sage 5.0
notebook using Firefox 13.0 (the present standard with Fedora 16). It
may be browser dependent, but I don't know.

With the following fragment:

N=2
@interact
def F(frame = slider(vmin=0, vmax=N, step_size=1, default=1,
label='stack frame')):
      pass

I'm unable to select "frame=1". Only "frame=0" and "frame=2" work. If
I increase N, things work as expected as far as I've tested.

If this a problem in firefox's javascript? Does it occur on other
browsers? Does someone know a workaround?

Cheers,

Nils

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