Your theme is a mess and the person that made these edits made them in the WRONG places.
I would personally recommend you create a new theme (fresh no changes). Use the edit theme to change the base colors and then ask how to change the other things after that.
The person that did this theme originally edited framework.css which is a BIG no, no and will cause you nothing but grief as you upgrade.
The theme itself wouldn't be hard to replicate and get working to what it looks like now. It seems to be primarily default with a ton of color edits and some added images.
That's my true recommendation. However if you just want to fix it issue by issue and not resolve your core issue this is how you fix your current one:
.ipsBreadcrumb, .ipsList_inline, .ipsList_reset, .cSignedIn, #elUserNav, .ipsList_inline, .ipsList_reset, .cSignedIn {
background: transparent;
background-color: transparent;
background-image: none;
}