BVCU, The problem is known to exist across a wide range of aircraft types. The problem of contaminated bleed air can potentially exist on any aircraft in which the cabin air is supplied using bleed air.
Its interesting that you say 'I can't believe the problem is there on all combinations'. A lot of people have trouble believing that this problem exists at all, especially given that aviation is supposed to be tightly regulated for safety.
There are countless examples of contaminated air events - if you need convincing, simply start searching around on the internet.
www.aerotoxic.org is a good place to start
PPD