For a number of years, until early 2007 when 3FDA adopted Actionscript 3, the following properties were used to control position and scale ...

element.position.x
element.position.y
element.scale.x
element.scale.y

3DFA now uses the Actionscript 3 properties ...

element.x
element.y
element.scaleX
element.scaleY

... and also allows Actionscript 2 properties ...

element._x
element._y
element._xscale
element._yscale

The older style properties were still allowed for the sake of compatibility with older projects. Unfortunately, the old property names now clash with some third party Actionscript 3 class libraries, and so they've been abandoned in 4.9.8.4.

If you have an old project that still uses these properties, you can easily update your project using Menu/Edit/Replace ...

Set the "Replace in all elements" option and replace ...

.position.x with .x
.position.y with .y
.scale.x with ._xscale
.scale.y with ._yscale

Actionscript 2 scales need to be used here because they range from 0 to 100 like the old properties did. Actionscript 3 scales range from 0 to 1 and are recommended for all new projects.