Up until I added a custom background, my navigation menu at the top of my site was always on white, so that the drop down lists of child pages would always cover the header with an opaque background. But now that I uploaded a custom background, the drop down lists are transparent... making it a little difficult to read the longer lists because they run into my header. What happened? I've even reverted back to the default header thinking that would fix it but the menu background still stays transparent. Is it really my custom background that is causing it?
The blog I need help with is upsilonkappadelta.wordpress.com.