chosen select problem

I see that phprunner uses the chosen library for multiselect.

It is a very nice library and based on the fact that it is already implemented I tried to use it also for single select.

I encountered the following problem: if the single select field is the last one then I can't see the lookup elements if they are too many and goes over the table that contains all the fields and inputs. I tried to use the css that comes with phprunner for chosen but it seems that it is modified only for multiselect elements.

Can anyone help me on this?

Edit:
It seems that chosen has a problem with div's that have overflow:hidden.

There is a fixed library posted HERE.