Heat and plastic don't get along well [Upd.]

Sébastien is the owner of a MacBook Pro. From the start, his machine on top of making much noise, heats very much. Yesterday he was surprises to see the plastic cache of the Airport antennas was losing its shape.



He contacted Apple that's due to inquire on this issue and will let us know of its results.
[Upd.] Henri-Jacques sent us pics proving Sébastien isn't the only one concerned.