BeautyTips + Jquery Update not working
According to the jQuery blog, the function curCSS was deprecated in jQuery 1.8:


  $.curCSS: This method was simply an alias for jQuery.css() from jQuery
  1.3 onward. Although it has never been part of the documented API, some external code has been known to use it, perhaps thinking it was
  “more efficient.” Now it’s “more gone.”


but since its simply an alias its possible to patch the beauty tips plugin to fix this. There is a patch here on Drupal.org that does just this and its been committed to the dev release. Its not ideal as you have to patch the library to get this to work but its really your only strategy since the beautytips plugin hasn't been upgraded for the newer versions of jQuery.