I installed Fancybox (jQuery lightbox implementation) plugin on my site running the Highwind theme.
The Fancybox would work, but theme's scroll-to-top link would not appear anymore.
Turns out this is a jQuery conflict.
Fancybox is loading jQuery AFTER it has already been loaded by Highwind.
The Highwind implementation of jQuery uses the noConflict function, which is then removed/overwritten when the Fancybox jQuery is loaded.
- Delete the script tag that loads jQuery for Fancybox. This means that Fancybox is now using the jQuery loaded by Highwind.
Now the Fancybox works and the scroll-to-top appears and works.
QUESTION FOR THEME AUTHOR:
It appears that by using "noConflict" in your version of jQuery, any other plugin loading jQuery will break theme functions such as scroll-to-top.
Have you implemented jQuery in the theme correctly?