I wrote a test program which I attached the VS2010 files for.  It demonstrates the problems I'm seeing with these two issues:
https://www.nevron.com/Forum/9186/AutoHide-tabs-hidden-from-loaded-DockingFrameworkState
https://www.nevron.com/Forum/9156/NDockingPanelTabInfoIndex-not-referenced-on-auto-hidden-panel

When launching the program it lists the steps to follow to see these two issues.  My program is seeing these two issues and I'd appreciate any advice on how to fix them.

Thanks for the tip regarding using the UnregisterDockPanel method.  I wasn't aware of the need to call this method.  I searched the documentation, examples, and the forum and only found one forum reference that mentioned it.  It might be good to change one of the example programs to use it so people can become aware of the need to call it.  I could not tell if it mattered but I call this method before I dispose of the panel.  If the order is important please let me know.

I downloaded the 15.7.10.12 build today and noticed it doesn't include the fixes for the icon and the tab order you said would be part of the next service pack.  Will this service pack be included in a build I can download soon?