jquery 1.4.2 selectables ui-1.8rc2 error *too much recursion*

jquery 1.4.2 selectables ui-1.8rc2 error *too much recursion*

Hello all,

I have updated my code from jquery 1.3.2 and ui 1.7.2 to jquery 1.4.2 and ui 1.8rc2.

I am using the ui selectables, and when using the newer libraries, I am now getting an error in 1.4.2 saying "too much recursion" on line 1599.

The selectable css works correctly upon selecting a new element, but actually checking the radio button does nothing.

Everything was working fine with the older libraries. 

A description of functionality: a user should be able to click on an entire <li> element to select a child radio button, rather than needing to actually press the radio button to select.

Here is a link to example code with the error, using the 1.4.2 and ui1.8rc2:  http://jsbin.com/asezu3

Here is the same code with 1.3.2 and ui1.7.2, and the demonstration works successfully:  http://jsbin.com/oguhu/edit

If anyone has any ideas, please help.