I wouldn't be surprised if they replaced the metal cap with the plastic one because the plastic one worked. The plastic part underneath the metal cap was a pain so the first thing you did was fit the metal cap without it... only (if I remember rightly again) to find the metal cap won't seal properly without the plastic underneath. So the first time you threw the machine around, the fluel sloshing about would start leaking from the cap.
The other small bit of entertainment for me was the pic in post "#68817 - 13/10/15 06:47 PM" above- I think the trigger was slightly different/stubbier on ours (and towards the back, near the fuel cap- yours may be mounted back-to-front). But that photo would have to be a static publicity shot, 'cos if the trigger's at the back then with the handle folded that way (for neatness of course) the black plastic knob actually obstructs the trigger from starting the engine- at least it did on ours!
