Please help me with color consistancy among group of link classes

Hello

Please look at this page

http://hypermastery.com/suggestions-test

Note that in the header that some fonts are showing as white and others are showing as black.  

I want all of the header to be white fonts with all stages of the link, so that they are consistant.

I am working with someone else's style sheet and html.  But I did go in and gave the th's a class where possible.

Some of the th's had "nowrap" as part of their markup, and I didn't touch those.  I assume I need to add a class to those too, but want to do it "the best way".

Below are the styles I added so far to the css.  

Looking for your expert suggestions!

...Rowby

th.gridsortx a, a:hover, a:focus {
	color: #FFF;	
}

th.suggvotesx a, a:hover, a:focus {
	color: #FFF;	
}

th.uggcommentsx a, a:hover, a:focus {
	color: #FFF;	
}

th.authorx a, a:hover, a:focus {
	color: #FFF;	
}

th.suggestdatex a, a:hover, a:focus {
	color: #FFF;	
}

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