Site looks good in Firefox and terrible in IE8

[dogloverstore]

Hello everyone, it's great to be here. I have been doing work on my website for the past 8-9 months now. And I noticed that in firefox it looks great but it is unaligned and all messed up in firefox.

The website is www.dogloverstore.com

can anyone look at the page source code and help me out with what needs to be done?

Thanks so much,

John

[HTMLBasicTutor]

You have 44 Errors, 95 warning(s) according to the W3C HTML Validator (http://validator.w3.org/). This where I start when I have a cross-browser issue. Quite often fixing these errors solves the problem, but not always.

There are also 27 errors in your CSS according to the W3C CSS Validator (http://jigsaw.w3.org/css-validator/). This is also a troublshooting tool I use.

It looks fine in IE8 and FF here. Did you try clearing your browser cache if you have made changes?