Content shifting in certain versions of flash player

Hi,

Due to the need to support older systems, we are currently required to support content published to Flash player 8, ActionScript 2.  We have a large library of content and recently, after a Flash Player upgrade, a large proportion of our courses suddenly started behaving oddly.  The main interface looked fine but the actual content inside was shifted upwards by about 70 pixels.  In some course ware this just looked a bit odd, in other pieces it actually made the content unusable as elements such as buttons and controls were pushed off stage.  The problem was manifesting in the following versions: 19,0,0,185 18,0,0,232 and 18,0,0,241 .  I created a hack fix by checking which player the user had and compensating the y position of the offending container which works but I was wondering if anyone had any other ideas or info on why this might be happening?

Many thanks