Help with "TypeError: Error #1009: Cannot access a property or method of a null object reference."

Can anyone explain why I keep cetting various messages when navigating to certain pages on Safari. I get several messages for example being:

TypeError: Error #1009: Cannot access a property or method of a null object reference.

at Preloader/startup()

at flash.utils::Timer/_timerDispatch()

at flash.utils::Timer/tick()

It seems to have something to do with adobe.

Please help it is driving me crazy..

Thanks

Matt