Romania operated an autonomy for Transylvania in the 1950s. As a result, all ethnic tentions disappeared at that time. When they abolished the autonomy in the 1960s, the ethnic tentions restarted. Autonomy may work today again but the times now may be somewhat different. Now a central governance from Brussels would probably be more ideal, following the model of the London governance of Northern Ireland.

Romanian anti-ethnic policies are low-key (but very effective) for the purpose to avoid mainstream media and a Kosovo-like scenario.

However, even the newly elected Romanian president, Basescu(?) declared on national radio a few times that the judicial system is totally corrupt, that over a 1000+ cases ended up in various European courts this year and 114 of them already reached a judgement against Romania.

Also, Hungarian statistics show a sudden immigration of 200,000 Transylvanian Hungarians into Hungary the last 5 years, only a little less than that immediately after 1920.

The Greater Romania Party that has ~10% representation in the parliament prints a racist newspaper that devotes at least one page every issue to bash Hungarians of Transylvania.

Also there are less spectacular evidences of abuse, like the Hungarian who just got out of prison after 10 years. He was jailed for being Hungarian in the 1990s Maros (Muresh) county ethnic clashes that were started by the then Romanian government.

The current Europe-friendly Romanian government may open a lighter chapter, but the serious danger is in the tendencies: Romanian national school curriculum has been actively indoctrinating Romanian children against Hungarians in a racist manner for over a decade now. As a result, more teenagers grow up who rather turn the war of words into a war of guns in Romania.

What would be worse than any war is if Romania successfully got rid of the Hungarians of Transylvania, without anybody noticing it, just like they got rid of the Saxons and the Schwabes.