Political honeymoons are strange affairs of very diverse lengths. Tony Blair's lasted virtually his entire first term, and then some. Barack Obama's was pretty short before he was plunged into the maelstrom of finance and health reform. The new Cameron-Clegg coalition enjoyed a good press conference in the No. 10 garden, and must then have wondered where its honeymoon went as 'senior' Tory backbenchers (well, Chris Chope anyway) on one side, constitutional experts such as the admirable Professor Hennessy on the other, and rejected suitor Lord Adonis on yet another, all honed in on the proposed change to parliamentary dissolution arrangements. This is yet to be debated, and there is hopefuly room for manouevre, although the key element of the change - the removal of the Prime Minister's right of choice over election dates - is to be welcomed. It is the 55% requirement in the Commons for a dissolution of a government to occur that is causing headaches. The angst over 55% may be over-stated, at least in terms of praticalities. The last time a vote of no confidence succeeded was 1979, where Margaret Thatcher famously forced Callaghan to call an election as a result of a one vote majority in the Commons. But Callaghan was pretty well at the end of Labour's term anyway, and would have had to have an election by the end of the year in any case. Before that vote, you'd have to go back to the 1924 vote against the minority Conservative government, which was passed by well over 55% of MPs.
There is, incidentally, some honeymoon joy for the coalition - although it is mixed. UK Polling Report indicates a 60% approval for the new government. Alas, 28% think it will last less than a year!