There is a small mistake in wpi.htm (wpi\Themes\Default) of the default theme <!-- The Defaults button. --> <a href="" onMouseDown="document.Defaultsbutton.src='./themes/Default/checkdown.gif';" onMouseOver="document.Defaultsbutton.src='./themes/Default/checkover.gif'; stm(getText(ttSelectDefaults),Style[0]);" onMouseOut="document.Defaultsbutton.src='./themes/Default/check.gif'; htm()" onClick="stopInterval(); startstop(); check('Default'); startstop();" > <img src="./themes/Default/check.gif" align="absmiddle" class="mainbtn" border="0" name="Defaultsbutton"> </img><font class="side" ><b><script>document.write(getText(lblSelectDefaults));</script></b></font></a><br /> Should be: <!-- The Defaults button. --> <a href="" onMouseDown="document.Defaultsbutton.src='./themes/Default/checkdown.gif';" onMouseOver="document.Defaultsbutton.src='./themes/Default/checkover.gif'; stm(getText(ttSelectDefaults),Style[0]);" onMouseOut="document.Defaultsbutton.src='./themes/Default/check.gif'; htm()" onClick="stopInterval(); startstop(); check('default'); startstop();" > <img src="./themes/Default/check.gif" align="absmiddle" class="mainbtn" border="0" name="Defaultsbutton"> </img><font class="side" ><b><script>document.write(getText(lblSelectDefaults));</script></b></font></a><br /> Default should be spelled in lowercase, as in check.js, small but simple bugfix seems to work for me!