uncaught exception: jQuery UI Tabs: Mismatching fragment identifier jquery1.4 - jquery-ui-1.6

I am getting "uncaught exception: jQuery UI Tabs: Mismatching fragment identifier" when i click on the second tabs.The div structure is similar to the

The div structure is similar to

<div id="tabs">

<ul>

<li><a href="#one"><span>Folders</span></a></li>

<li><a href="#two"><span>Users and Groups</span></a></li>

</ul>

<div id="one" > jsps used </div>

<div id="two" > jsps used </div>

</div>

The id doesn't contain any special characters, and it follows the naming conventions of tabs.

Things are fine with jquery 1.3,

i am using jquery 1.4.1 and jQuery UI Tabs 1.6.

is jquery 1.4.1 compatible with jquery-ui-tab 1.6? when i used the jquery-ui-1.8b tab file,still the issue was there

thanks