I am using Zen Cart 1.3.8

I am having trouble trying to figure out why my category side box heading is not meeting the thin inside line properly.

To see what I mean visit my site at: http://passionsignite.com.au/zen-car...eset-12112007/

Can anyone help me fix this problem.

I know that most people might not notice this but I'm a bit of a perfectionist.

To me it really stands out.

It's meeting the out side line properly but not the inside thin box line.

Any suggestions or solutions?