[OS X Emacs] Handling AucTeX errors

[Enrico Franconi]

With Aquamacs/Cocoa: whenever I hit "^C`" to get the explanation of a  
LaTeX error, Aquamacs opens a new tab called "Web2C 7.5.7" instead of  
just keeping in focus the tab with the source LaTeX file (see  
attachment, if it goes through the mailing list). In the carbon  
Aquamacs everything works as it should.
Any explanation for this odd behaviour? How to fix it?
cheers
--e.

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