I have tried adding the Arial font and grey #333333 background into the syles.css file and my ie 10 in Win 8 pro cannot render them (both modern app and desktop app versions).  I also can see the After file renders correctly.  I hit CTRL-F5 and it doesn't help.  Also I made sure that the two files are in same folder.  Still nothing.  Any advice?

I tried copying the After files into working and cutting and pasting elements to and from the original file.  In one case I did see the Arial and grey #333333 and then when rendering the same page again the css stopped being used.  Hmmmm.   Any help.