Stylesheet String was not correctly defined (missing ";" after "%2") and caused an error in logging output.
After checking the fixed Style I removed it since it does not really look good.
Newer Windows versions are also displaying a 256x256 icon. If this icon size is not present, the 48x48 icon is used, but not resized. This means there is a possibly large empty area around the icon.
Oskar Kruschitz