tThe ICCCM states that window classes should be capitalised. - surf - customized build of surf, the suckless webkit browser
  HTML git clone git://src.adamsgaard.dk/surf
   DIR Log
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       ---
   DIR commit 543d0c77ee1ec96f57966e06337eb0351adae017
   DIR parent bc73b48743eb0b51905322cad25b4647569e7996
  HTML Author: Troels Henriksen <athas@sigkill.dk>
       Date:   Fri,  4 Nov 2011 13:57:04 +0100
       
       The ICCCM states that window classes should be capitalised.
       Diffstat:
         M surf.c                              |       2 +-
       
       1 file changed, 1 insertion(+), 1 deletion(-)
       ---
   DIR diff --git a/surf.c b/surf.c
       t@@ -461,7 +461,7 @@ newclient(void) {
                         * window class (WM_CLASS) is capped, while the resource is in
                         * lowercase.   Both these values come as a pair.
                         */
       -                gtk_window_set_wmclass(GTK_WINDOW(c->win), "surf", "surf");
       +                gtk_window_set_wmclass(GTK_WINDOW(c->win), "surf", "Surf");
        
                        /* TA:  20091214:  And set the role here as well -- so that
                         * sessions can pick this up.