I'm Australian but left in 2008 (for what should be obvious reasons as we're discussing this on HN). What's the constitutional crisis?
This isn't a constitutional crisis in the 'dismissal' sense.
It's just the operation of s44 of the constitution causing a headache for parliament. Its been found that many of the parliamentarians are dual citizens, which is forbidden, and their seats in parliament have been nullified by the high court.