link isnt turning purple letting me know i already clicked on it with safari 4?

do you all know how on google when you do a search and you click on the links it gives you they turn a different color letting you know youve clicked on it. safari does that for me with google but not with a certain website. here is the website im talking about>

http://www.mixtapetorrent.com/4-clas...y-slay-dj-envy

just so you all know when i use firefox and click on these links they turn purple but not on safari. and also i have my history set on delete after 1 day and i have the database storage set at 1 megabite. is there any way to fix this?