JSF component displaying incorrectly

I have a problem when i run my jsf application. The components don't display correctly. For instance, a button that is suppose to have the rounded edges and hint of blue color show up like a normal sqaure gray button. This only happens on my computer though. If someone else logs onto my jsf page from their computer the button displays correctly. What am i missing?
Thanks
Dave

I am using jsf components from JSF Core library. Yes I cleared the cache several times and it still happens. I am using Firefox version 2.0.0.6 and IE version 6.0. Do I need to update to IE version 7? I wouldn't assume so since others that have version 6 see components correctly.
Thanks for you help. Sorry my question is vague. I could give you more detail but i don't know which detail is relevant to my problem. Maybe thats part of my question... What settings and configurations could cause this. Should I be looking into JRE version (which is 1.6)?
Thanks
Dave

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xmlns:h="http://java.sun.com/jsf/html"
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</div>

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