Noob-ish question:  So, what does the exception class SecurityError
actually cover?  I've been unable to find (without looking at the Ruby
source code) a quick and dirty explanation of what kinds of security
issues are caught by SecurityError.  I've got the Pragmatic book and
the Nutshell book, but neither go into any detail about what the class
catches.

Is there possibly an online resource that I haven't found that
explains this?

Thanks,
Hig