enableItemEditor layout/select issue

I’m using a dhtmlxtree on two different pages.
On one of the pages the double click on a node works perfect as the other one gives me some strange behaviour: double clicking gives a selected piece of text instead of just the cursur line. Or I’m not getting the cursus at all. Or sometimes it is not possible to select a piece of text by double clicking. Typing works, but the user doesn’t have a clue where to look.

See attach.


This issues happens in Firefox : 7.01

Can you provide demo link where we can reproduce this issue?