Firefox problem on CVS

Taxonomy_dhtml works fine on IE 6.X and Mozilla 1.7 on using Linux RH 9 server and Windows XP client. However on the same setup with Firbird it goes insane. Firebird 9.1 and 9.2. What happens is that when clicking on the plus symbols to expand a node the browser doesn't expand the node but instead bumps you to another view [/taxonomy/view/or/45 is and example and /taxonomy/view/or/47 for the menue below ect..]. When clicking the same exact node or defintion in IE and Mozilla the menu expands and the taxonomy_dhtml stays in the address bar as it should.