false positive report for Non-supported Character Set found:(iso-8859-1). As per our analysis if we right click on any webpages in IE8, we will see Western European (ISO) as one of the charset that can be used to render pages. This charset has been built into IE since version 5.
An issue with the plugin that generates this report has been discovered and is being addressed in an upcoming hotfix.
At the time this document was authored, there is no known fix for the issue and is being addressed in a future hotfix.