Product Recall: Ikea Malm dressers
The deaths were in the US, and according to the Consumer Product Safety Commission, these "chests and dressers can tip over if not attached to the wall, posing an entrapment hazard."
Instead of taking your Malm chest back to the store, Ikea are offering wall-anchoring kits, for free.
Obviously, it'd be wise to keep children away from the furniture until you get your repair kit, and don't put anything heavy on top of them, like a TV, which might tip the dresser over.
If you'd prefer to ring someone about this, then call Ikea on 020 3645 0000.