In Luchio's bedroom there is a sticker for the FM radio station Triple M. At time the film was set, MMM did not exist (it began as EON-FM at that time) and there were in fact no commercial FM radio stations broadcasting in Melbourne. The radio station the cast do listen to, 3XY, was an AM station that changed to FM and became Triple M; this may have been a bit of product placement.
At one point, a cover for the Marvel Comics title "The Thing" is seen tacked up on the notice board. That series wasn't published until 1983, and the specific issue cover seen was published in 1985 - several years after the events of the movie.
When Anna is buying Sam a microwave brick at the store, an issue of National Lampoon from 1985 is seen on the magazine rack.