some interfaces won't add?!?

Hey jffnms-folks, I've got a problem that results in some detected
interfaces not being added/addable. Perhaps someone has seen this before?

To start, I am kicking off a "manual" autodiscover from the hosts menu.
All the interfaces on the host will be detected and I can select them,
but only some of them will show up under the post-autodiscover screen
and get added to the db. The rest are ignored as if I didn't check them. 
It's not a browser thing, firefox and chromium both do it.

This happens both on a jffnms install on debian stable that I've had
around forever, and a fresh/current one I installed on a VM just to test
for this problem. I have two cisco 6509s that have rather a bunch of
interfaces in/on them that I've been testing with--they have different
supervisors, card configurations, OS versions, etc, but both elicit this 
behavior.

I did a discover and 'mark all interfaces' on my test install and it 
ends up adding all of the detected/marked interfaces down to some 
certain point, after which nothing else will add.

If I remove one of these hosts and add it back in, then detect 
interfaces and add one or more of the choice of un-addable interfaces 
(for instance a bgp neighbor "interface", I just tried it) the next page 
declares "no interfaces found."

Any idears?

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