When a link is clicked on Windows Vista, the page opens in Internet Explorer even if another browser is selected as the default.
This issue occurs when using links
<a href=""></a> in the htmlText attribute of the
Windows Vista does not make the required additional registry entries correctly when a browser other than Internet Explorer is set as the default browser. When an attempt to load the URL is made, Adobe AIR uses Dynamic Data Exchange (DDE) to connect to an open instance of the browser registered for URL requests. If that fails, Adobe AIR falls back on Shell Execution.