<plugin name="testname" align="rightbottom" edge="rightbottom" zorder="3" enabled="false" width="185" keep="true" url="%SWFPATH%/skin/white/footer_bg_v3.png" alpha="1" visible="true" />
Visibly everything looks right. However the area of influence extends roughly 35px more than it should to the left.. covering up an enabled plugin. I thought it could be due to 1px width, but also tested 2px width source.
In the screen shot is where the mouse was, still activating the plugin.
Thanks for looking.