4.1.3 is recommended to users of Firefox 3.6.24 on XP Rated 3 out of 5 stars

on firefox 3.6.24 on XP
4.1.5 of this add-on works wrong
Downside of screen, funny text appears broadly.
that maybe wrong display of SearchMenu of Fast video Download.

4.1.3 of this works right.

on Firefox 8.0 on windows7
4.1.5 works right

on Firefox 9.0.1 on XPmode of windows7
4.1.5 works right

This review is for a previous version of the add-on ( 

We apologize for the problems caused with version 4.1.5 on Firefox 3.6. Unfortunately, our testing was inadequate and the error slipped through. We promise to be more conscientious with our testing on Firefox 3.6 in the future.

We have submitted version 4.1.6 to Mozilla. It will fix the problems you're seeing on Firefox 3.6.