Loader problemas on Macs?

I have alsmost finnished my home page created and tested in flash mx on a pc. Everything has worked as expected, however the other day I treid viewing the same files on a mac and the loader bar instead of showing a percentage showed bytes loaded (i think) instead??? here is the code I used for the loader:

onClipEvent (enterFrame) {
loading = _root.content.getBytesLoaded();
total = _root.content.getBytesTotal();
percent -= (percent-((loading/total)100)).25;
per = int(percent);
percentage = per+"%";
loadBar._width = per;
if (percent>99) {
_parent.gotoAndStop(“opening”);
}
}

has anyone come across this before or know why it works on a pc but not a mac?

thanks

Sany