When I log in yahoo mail it is very slow and a Script: http://mail.yimg.com/d/combo?/shows up. how to avoid th?

Script: http://mail.yimg.com/d/combo?/mg/6_1_1/js/yui_utils.js&/mg/6_1_1/js/core.js&bc/bc_2.0.4.js&/mg/6_1_1/js/darla.js&/uh/js/uh-1.3.2.js&/mg/6_1_1/js/async.js&/ult/ylc_1.9.js&/mg/6_1_1/js/imboot.js&:1