red or green color background around sub task number is missing/incompatible in Internet Explorer 6.0 and 7.0

To reproduce:

• login with Internet Explorer to your Jira Enterprise 3.7.2 application
• Go to an issue which as some sub tasks
• You will see a numeric list of sub tasks: 1. Some title; 2. Some Other title and so on.

With Firefox 2.0 or Konqueror 3.5.5 (I tested with these 2 browsers) I see that the number (in my example: "1." and around "2.") has a red background color if trhe issue is open. If the issue is closed/resolved: the number has a green color.

With Internet Explorer 6.0 and 7.0 there is no background color.

I've just upgraded from Jira 3.4.3 Enterprise. In version 3.4.3 Enterprise the background colors where shown correctly so I guess this CSS/HTML bug is present from a version newer than 3.4.3.