I think "aluminum problems" fall into 2 categories. Either there was a bad install in the first place or harry homeowner was in there "improving" things.
The fact that there are millions of aluminum wired homes that didn't burst into flames tends to say a properly installed system that nobody screwed with is probably OK. The owner of an aluminum home should have an extra layer of vigilence and they should leave repairs to pros but we say that anyway. ;-)
