Screenshot of IE 7 rendering of ULS; Screenshot taken on Commons-Login form
ULS seems not even to have a "basic" level of support for IE7.
You may wait until someone else can confirm this issue (depicted in the screenshot) with IE7 as it may depend on customization/settings or some JS-Errors at Commons in IE7 etc.
Possible solutions (if it is really an issue with that extension):
Either the extension is marked as incompatible with IE7 (and deactivated in this browser) or the issue is fixed.