> Can anyone tell me whether this behavior has been seen elsewhere? Were
> triggers
> on system tables ever intentionally allowed?

to my knowledge they were always destined to be dumped, certainly always via
backup restore cycles. So you might be wasting a lot of your time in this
regard
Alan

> Are there known issues
> that could
> cause them to disappear seemingly randomly? Did I just code this last
> one wrong?
>