What you need to remember is this style was originaly designed for 7.0 then 7.1
So a couple of css classes have been added over the different versions.
I use the one Rick posted "324-ubbcentral_style_7_1.zip"
for 7.5.3 but you still need to go edit the style and copy a couple classes to make it look good.
DL posted a update a couple posts above. I have not tried it but it probably already has the few edits needed for 7.5.3
But to be honest they all will work, just some of the features will be missing the style format due to they were added after the style was designed. It really is simple to add them after the fact.