To Expand, this is not an EVE coding fault, as Astro eluded to on the comment on my prior post the OSX 10.6 system does not allow full screen apps to work accross multiple monitors.
This is a hang over from days gone by before hyperthreading where full screen applications would consume CPU even when minimised to dock.
To get around this resource sink apple decided to encode one full screen app at a time and all other items almost go to sleep as a result.
In todays terms this may seem silly with x64 quad core systems, hyperthreading and all the rest of it, but back then it did make sense.
There are rumours that the new OSX Lion may remove this constraint, but at the moment these are just rumours I believe.
However running EVE full screen on two monitors in Windows 7 isn't exactly a picnic either.
Sighs***