Explorer tree branch label is overlaped In IE

Explorer tree branch label is overlaped with other colors in IE.In firefox its displayed properly.
below is the code where treebranch name is not goodlooking in IE.

<div xmlns="http://www.w3.org/1999/xhtml"
        xmlns:b="http://www.backbase.com/2006/btl"    
        xmlns:e="http://www.backbase.com/2006/xel"            
        xmlns:exp="http://www.backbase.com/2007/explorer" e:behavior="exp:explorerMenuTree">
 
        <exp:tree id="BackbaseTree" label="MYBackbaseTree" selectType="single" style="width:100%;height:100%;">Tree
        <exp:treeBranch label="MyBIGGroup" e:behavior="exp:explorerMenuItem" />
   <exp:treeBranch label="smallGroup" e:behavior="exp:explorerMenuItem" />    

<code>
label like MYBackbaseTree is overlapped with other color in IE .

Explorer tree branch label is overlaped In IE

Hi backbaserk,
In which BB do you use ? I tested the following code in BB 421 and it is ok.

<exp:tree xmlns="http://www.w3.org/1999/xhtml" xmlns:e="http://www.backbase.com/2006/xel" xmlns:exp="http://www.backbase.com/2007/explorer" xmlns:xi="http://www.w3.org/2001/XInclude" padding="5px" e:behavior="exp:explorerMenuTree" selectType="single" style="width:100%;height:100%;">
   <exp:treeBranch label="MyBIGGroupddd" e:behavior="exp:explorerMenuItem" />
   <exp:treeBranch label="smallGroup" e:behavior="exp:explorerMenuItem" />

~Yudi