Trouble With IE8

I just finished coding a new homepage from my designer and started cross testing it. I noticed in IE8 the border I put around the nav login item is fine, it defaults to no border radius obviously, but it still shows. However, there are three buttons I coded under the 1/3 sections in middle of page that dont show at all. I tried looking at it in sauce labs using the IE8 dev tools and most of the styles werent showing. I dont understand why the link text doesnt even show though. Is my code wrong or do I need to write an exception (which ive never done before)? Any suggestions?

PS- What do you usually offer to your clients as far as standard browser support?

IE8 does not like:

style.css (line 137)


a.buttons {
    position: relative;
    top: 100%;

If disabled, the buttons appear.

@ronpat
Thank you very much sir! I tried browserstack.com and that worked better than sauce labs, much faster too.