simple layout fix for IE
Arguably the simplest (and least Drupal'y) way:

In html.tpl.php:

&lt;head&gt;
&lt;!--[if lt IE 8]&gt;
&lt;link rel="stylesheet" href="&lt;?php print base_path() . path_to_theme(); ?&gt;/css/ie7.css" type="text/css" media="all" /&gt;
&lt;![endif]--&gt;
&lt;/head&gt;


Clear your theme cache if adding the template to your theme for the first time. 
Install the module, Conditional Stylesheets, which allows you to add conditional stylesheets to a theme's .info file. 
Add 37 lines of code to template.php.


New to StackExchange, hope I did the right thing here. Thanks, @jdu.