I was mucking around with this last night. I found if you set the project settings for the Player (web and app) to 64 x 64 size then all was good. Only problem is when building for the web, you get this large unity logo (which does disappear) but you also get the "Development Build" text that doesn't disappear and covers 1/3 of a screen real estate in a 64 x 64 window. I'm thinking of making the web one 64 x 96 to accomodate for the text but just use the 64 x 64 area. Either that or I abandon using the web player.