I've just received advice directly from a workplace health and safety inspector that apparently blue/white cards done by online training providers are being rejected as evidence of generic induction as there's no proof as to who actually sat the exam with them.
Queensland is not being affected, according to the inspector WA is the most stringent, they have also been rejecting cards done interstate inspite of the new white card supposedly being country-wide. That would be too simple!
Also, technically under workplace health and safety regulations, the old blue card is invalid as the regs state that it needs to show your birthdate; the blue card didn't, the white card does, so if you have a blue card, easiest thing is to tell your RTO that you lost it and they'll replace it.
There'll be plenty of people here that have had no problems, but they're beginning a crackdown on them. So if you have the choice, go to an RTO in the state you intend to work, it'll save you hassel long term by the sounds of it.