Tutorial: Efecto imagen blurry

Tema - Personalizar (Editar HTML) - CTRL+F y buscas: ]]></b:skin>

Arriba de ]]></b:skin> pegas lo siguiente:

De normal a blurry

img{
-webkit-transition: all .7s linear;
-moz-transition: all .7s linear;
transition: all .7s linear
}
img:hover{-webkit-filter: blur(1px);z-index: -99px;}

De blurry a normal

.post-body img{-webkit-transition: all 0.4s linear;-moz-transition: all 0.4s linear;transition: all 0.4s linear;filter: blur(2px); -webkit-filter: blur(2px); -moz-filter: blur(2px);} .post-body img:hover{filter: none; -webkit-filter: blur(0px);-moz-filter: blur(0px);filter:progid:DXImageTransform.Microsoft.Blur(PixelRadius='0');}

vista previa: