From http://www.cssreflex.com/snippets/comprehensive-list-browser-specific-css-hacks/

browserhack.css

<style>/***** Selector Hacks ******/  /* IE6 and below */* html #uno  { color: red }  /* IE7 */*:first-child+html #dos { color: red }   /* IE7, FF, Saf, Opera  */html>body #tres { color: red }  /* IE8, FF, Saf, Opera (Everything but IE 6,7) */html>/**/body #cuatro { color: red }  /* Opera 9.27 and below, safari 2 */html:first-child #cinco { color: red }  /* Safari 2-3 */html[xmlns*=""] body:last-child #seis { color: red }  /* safari 3+, chrome 1+, opera9+, ff 3.5+ */body:nth-of-type(1) #siete { color: red }  /* safari 3+, chrome 1+, opera9+, ff 3.5+ */body:first-of-type #ocho {  color: red }  /* saf3+, chrome1+ */@media screen and (-webkit-min-device-pixel-ratio:0) { #diez  { color: red  }}  /* iPhone / mobile webkit */@media screen and (max-device-width: 480px) { #veintiseis { color: red  }}    /* Safari 2 - 3.1 */html[xmlns*=""]:root #trece  { color: red  }  /* Safari 2 - 3.1, Opera 9.25 */*|html[xmlns*=""] #catorce { color: red  }  /* Everything but IE6-8 */:root *> #quince { color: red  }  /* IE7 */*+html #dieciocho {  color: red }  /* Firefox only. 1+ */#veinticuatro,  x:-moz-any-link  { color: red }  /* Firefox 3.0+ */#veinticinco,  x:-moz-any-link, x:default  { color: red  }      /***** Attribute Hacks ******/  /* IE6 */#once { _color: blue }  /* IE6, IE7 */#doce { *color: blue; /* or #color: blue */ }  /* Everything but IE6 */#diecisiete { color/**/: blue }  /* IE6, IE7, IE8 */#diecinueve { color: blue\9; }  /* IE7, IE8 */#veinte { color/*\**/: blue\9; }  /* IE6, IE7 -- acts as an !important */#veintesiete { color: blue !ie; } /* string after ! can be anything */</style>