[Koha] custom logo for 3.0.03 - user.css

I had installed 3.0.01 and customized the logo size in opac.css. It worked fine. Now I have installed 3.0.03 and I did replace the opac.css file in the ../opac-tmpl/prog/en/css folder but the logo shows in the default size. Where or how do I change the logo in 3.0.03 ? Rudy Wuthrich Kodaikanal International School