At least on my system, if enough feeds are slow to
respond, or down, the update takes so long that
something is giving up. I suspect my PHP installation
may have a script time limit set. It's reasonable to
assume that other people's servers may have timeouts
too, and FoF shouldn't require this to be changed.
The update should be faster, and should get past bad
feeds more quickly. If it could be parallelized
somehow, that'd be great.