Rockets exploding on launch pad

[shawrie777]

I have a slightly irritating problem. When I click on the launch pad and choose a rocket, it sometimes blows up for no apparent reason. It happens with rockets I've launched many times before, usually when I want to launch many of the same type. This isn't a huge problem because it works fine if I click launch from the VAB, but it is a bit annoying when I know there is nothing wrong with my design. Any one know why that might be?

[DanielCoffey]

Do the rockets move off the pad at all or just 'splode on the ground? It may be the "sticky Launchpad bug" which can be cured by putting launch clamps on the sides or a decoupler at the bottom.