For me it was TeamViewer that did not show the shadows. Om the pc itself it works on most of the Windows. Outlook2013, Word 2013, Visual Studio 2013, all no shadow. And that are the mostly used applications on my machine, so what is the pro for ShadowFX? The poor grey shadow of Office 2013 does not charm me. But Microsoft is now using a kind of flatlook for those applications, which behaves different then normal Windows forms.