Weird Flash and Mac issue, need help :)

Hi, Im having a weird issue ( well at least weird for me hehe ) with an app. Im working on… I developed a video/audio player for a website, pretty basic, just some controls here and there, progress/seek bar, volume bar, nothing fancy…What is bothering me is that on windows, on every browser runs smoothly, suddenty I got a call from my client and tells me that on Mac it doesnt, so I tried on a Mac ( intel core 2 duo ) and everything is fine, I tried with a Mac with PowePC and oh my god what happens!!! hehe What I notice is that on Mac with PowerPC if a click on any of the controls (play/pause button, etc) they disappear as if the flash player stops rendering them…very weird… I read at excelent blog http://www.kaourantin.net/ that mac and intel based pc handle image rendering different of course, but I dont know how to overcome this. Anyone has gone into similar issue before? Here are some screenshots so you guys get the idea

With Intel Box:
http://www.estudiosbinarios.com/lab/Intel_box.jpg

With PowerPC Box:
http://www.estudiosbinarios.com/lab/PowerPC_Box.jpg

Thanks in advanced!