Focus issue with iPlayer full screen mode

On Mac, if you are watching a programme in fullscreen using the download version of iPlayer and another iPlayer programme finishes downloading in the background then the 'download completed' alert pops up on top of your fullscreen programme (OK) but it also puts the apple dock in front of the fullscreen programme (not OK).

Ideally these alerts would use growl when available, for consistency with other Mac OS applications.