Potter fans are not amused.

The sixth Harry Potter film, Harry Potter and the Half-Blood Prince, originally scheduled for a November 21 release, has now been moved to July 17, 2009 in the US and major international markets

Warners claims it’s because the writers’ strike threw off the skeds for other potentially big openers. Does that mean it needs Potter to save 2009, after 2008 got the surprise benefit of a bigger-than-expected Bats? Or does Potter 6 need major re-work? Furious fans want to know…