Long story short.

I have a simple flash movie called player.swf which consists of 1 frame + 1
FLVPlayback component + 2 lines of actionscript,

the two variables I am passing work fine. The player is being used to display
videos contained within tutorials.

It works absolutely fine in IE.

In Firefox it works once but the second time you try to load a tutorial the
movie is blank. Nothing shows up whatsoever! The movie is there, I know this
because a quick right click displays the flash player menu.

I close the site, clear firefoxs cache, and voila. Works first time again but
only works once..

Any ideas?



player.contentPath = file;
player.skin = playerSkin;

Try this technote.. it'll force your variables to reload every time..

How to prevent caching of loaded variables (http://www.adobe.com/go/tn_15951)

Not entirely sure that's it from the description, but it sounds likely..