It seems that the mouseInit function (used in WordPress admin area) and many other mouse functions are no longer in jQuery UI core in 1.8. Have they been moved elsewhere?

The reason for my question is because I built a WordPress plugin using Autocomplete in jQuery UI 1.8 and thus and using UI core, widget, and position from 1.8 (RC2 right now). However, that causes significant issues in with the WordPress admin functionality, whether or not I run both 1.7.1 and 1.8 side by side or deregister 1.7.1 and use 1.8 exclusively. Is there some suggested way of doing this, or should I switch to a different autocomplete script?

Thanks!

-Scott