Launchpad problem in Mountain Lion
I have recently purchased an iMac running Mountain Lion (previously had iMac running Snow Leopard). I was rearranging the icons in Launchpad but now something appears to have gone wrong. When I open launchpad it goes to page 2 of the launchpad. When I scroll to the left to get onto page 1 of the Launchpad it immediately rebounds onto page 2 so I cannot get it to settle on page 1. How do I reset it?
iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.4), 3.4Ghz Intel Core i7, 16gb DDR3.