I don't get why, whenever RE prices go up in short sharp bursts(which is what they do historically) that they start calling "bubble"
Sydney for example had its last boom ending in 2003. Nothing much happened then until 2009. It has only been the last 8-9 months since the RBA dropped IRs in Dec 2012, that the market has really started moving significantly again.
My personal view is that the free market will sort it out without intervention.
If they did cap LVRs at say 80% it would hurt:
1. FHBs
2. Very aggressive investors - although many investors who build large portfolios, do have conservative LVRs anyway.
3. MI companies - not that I have too much sympathy for them.