This forum is for Peer to Peer support for our customers. This is not the official support venue for IBTheme.com.
Please open a ticket in your Support Area for official support or use the The IBTheme Bug Tracker to report skin errors.
Your sure talking about same mobile navigation ?
We have 4.2.7 installed and no issue have been spotted if was bug we fix it, and background image can be added by you but unsure what theme would look like.
The shoutbox will not load on the Spring Fling theme. It works fine on the other themes. I had the same issue with my 4.1.17 themes I was using from here. I suspect it was some small thing that was missed in the theme upgrade.