It seems if you set a background color either for the modal popup as a whole or any control within the modal popup then the password strength indicator's z-index is too low so it is hidden behind the modal popup and cannot be seen.
Comments: The issue is fixed and the fix is included in the future release. Related cnahgeset: [8bf2f68](https://ajaxcontroltoolkit.codeplex.com/SourceControl/changeset/8bf2f68a5e39f77c523f39d16d6e1d3b82832694)
Comments: The issue is fixed and the fix is included in the future release. Related cnahgeset: [8bf2f68](https://ajaxcontroltoolkit.codeplex.com/SourceControl/changeset/8bf2f68a5e39f77c523f39d16d6e1d3b82832694)