Deprecation problems?

Hi all,

first I must apologize that I'm totally and hopelessly behind in reading 
the mails on the lists. I couldn't find answers to the following 
questions, so please be kind if I just overlooked them.

And I'm sending this to the foundation list because I think this is a 
harvesting issue...

Why are a lot of the (browser, Undeclared references) query messages 
broken by the introduction of SystemNavigation (I'm using image 3.6a 
update 5247)? And why are there 9 implementors of #systemNavigation all 
over the system? (I guess that is what the class extension discussion 
was about, I read that much)

And the deprecated call should allow you to proceed with the deprecated 
version until it is fixed and not just cut you off. Boy, we went down 
this road with modules, didn't we?

Michael