You do not need such an exact pixel-perfect interface. There is something more important, usability. The most important aspect of your site is its usability. This is why Yahoo doesn't get rid of the fuzzy border and Amazon has spent millions on usability studies to get the maximum possible amount of sales.
There is no good way to get rid of the fuzzy border, and there is no reason to limit your visitors' ability to use your site.
For more information... http://www.cs.tut.fi/~jkorpela/www/links.html#selrect