Errors while updating gems

I’ve reported this before, but never heard anything. Maybe someone now
has some insight.

When I do a gem update, I always get errors like the following:

Successfully installed actionpack-1.12.5
Installing ri documentation for actionpack-1.12.5…
While generating documentation for actionpack-1.12.5
… MESSAGE: Unhandled special: Special: type=17, text=“SimpleXML”
… RDOC args: --ri --op
/usr/local/lib/ruby/gems/1.8/doc/actionpack-1.12.5/ri --quiet lib
(continuing with the rest of the installation)
Installing RDoc documentation for actionpack-1.12.5…

It happens for several gems - this time it was Actionpack,
Actionwebservice, Activerecord (twice in the same session too!)

Anyone have any insight as to why this happens? If I do an individual
update of the problem gem, it proceeds without error - but I’m not
totally convinced that everything was installed.

Anyone? Anyone? Bueller?

Thanks,

jt