JSF - *.taglib.xml - attribute default value

I am facing a strange issue in JSF; The taglib.xml which I am trying to use for my jsf facelets; I am not sure how to set attribute default value in case of facelets so I tried this alike way (see code):

<tag>
<tag-name>ball</tag-name>
...
    <attribute>
        <name>color</name>
        <default>green</default>
        <required>false</required>
        <type>java.lang.String</type>
      </attribute>
...
</tag>

but I am really not sure cause seems like eclipse 3.7 content assist in case of having this default element doesn't work so I cannot use ctrl+space :(

So my question is... how really to set facelet default attribute value and if the <default></default> is correct then how to make my content assist work again 'cause, as I can remember, previously with no <default-value></default-value> it worked fine?

Thanks

Emm... After some testing I may confirm that <default> and <default-value> do make possible to set default attribute value (it is pretty clear watching generated html) but having those elements in *.taglib.xml make impossible to use eclipse 3.7 content assist :P

So probably, yes, it is some eclipse content assist issue...

p.s. I am still searching the issue coming exactly from so feel free to comment...