My miserable phone modem connection at home has protected me thus far from experimenting with apt-get upgrade on any Knoppix HD install. In a couple of days, though, I'll have a machine at work which I intend to partition for a Knoppix HD install, and it'll be connected the fast way to the Internet.

So in general terms, from those of you who've apt-get upgraded:

How dangerous is it given Knoppix's heterodox mix of debian and nondebian packages? What kind of pitfalls are common? What tricks, if any, can help get around them?

I realise that I can just install plain debian and upgrade safely from there -- but I'm genuinely interested in what does and doesn't go wrong with the Knoppix version of this, and hope that those of you with experience will be enlightening. Thanks!