I am working on a SP2010 migrating to SP2013 project. Since the customized Master page cannot be converted directly, I am using the old image and CSS to make up a new Master on SP2013.
When I apply my customized Master page, there is a black bar added below to ribbon bar causing everything descent for a few pixel:
I am using IE8 and the developer tool show me "s4-ribbonrow" have these styles applied:
I think none of them add a black bar. What else I should look into? The black bar don't exist if I change back to oslo Master page.