Comment counting number not showing in IE

I’m using the theme “aav1”. I have modified the theme but this issue occurs in the original version of the theme as well.

So as every wordpress comment section goes… when looking at a post’s comments, they are numbered… 1. 2. 3. 4., and so on.

But in Internet Explorer on Windows (I’m running version 6.0.2900) the numbers are cut off, and you can only see the far right single pixel of the character.

Here is how they look correctly in Safari: https://subtractison.com/wp-content/uploads/external/support/comment-number-issue-mac.png

Here is how they look incorrectly in IE: https://subtractison.com/wp-content/uploads/external/support/comment-number-issue-windows.png

Any help would be greatly appreciated. Thank you.