Need help finding why CSS not working in IE

i have some issues with my site CSS i developed the site without IE and now when i try to fix IE bugs the problems seem so overwhelming, what and how will u use to debug? it seems like a bug in tumblr cause invalid code to be generated? hmm ... its ok in firefox tho lol

<a _blank="" target=" target=" href="h开发者_如何学Pythonttp://fadeyev.net/2010/06/19/lessjs-will-obsolete-css/">Less.js Will Obsolete CSS</a>

I wouldn't blame this on css or IE. Its problems with your a tag..

<a _blank="" target=" target=" href="http://fadeyev.net/2010/06/19/lessjs-will-obsolete-css/">Less.js Will Obsolete CSS</a>

Should be

<a target="_blank" href="http://fadeyev.net/2010/06/19/lessjs-will-obsolete-css/">Less.js Will Obsolete CSS</a>

Making sites IE-compatible is a lifelong endeavour. IE's own developer toolbar helps a lot. QuirksMode has a formidable library of browser compatibility information. I see you're already using jQuery and a CSS template, but it bears repeating that piggybacking on frameworks that have already been developed with compatibility in mind helps a lot. If you're not comfortable running virtual machines, Browser Shots is a pretty good tool to make sure your site works a variety of OS/browser combinations. Finally, I would consider IE6 to have a low enough market share to justify not concerning yourself with that level of compatibility.