How can a main dealer break a rocker?

[raw cerb]

Had my 406 HDI in for a cambelt today. I received a message saying that they broken a rocker, and need to order one in.

How the hell can they break a rocker? Is it possible that they fitted the new belt incorrectly, and screwed up a rocker, (and probably valves too)? Any ideas appreciated, as I shall be calling them for an explanation first thing in the morning.

[raw cerb]

just got it back. I reckon that it broke on first start up after fitting the belt. The heard it, and instant misfire followed. They assure my that they have checked and rechecked compression and diagnostics.

I would say that it is running fine now. The sticking valve bit bothers me, but if the truth is known, I reckon that they fitted the belt incorrectly. If the valve stuck, I assume it'll do it again!

[raw cerb]

It broke down yesterday on the M25. Why? Because the induction pipe came off because it had not been screwed on properly!!!!

Although engine runs fine now, the dipstick now pops out. The oil level looks high, so hopefully its as simple as that. I fear worse though.