Apart from the fact, that I believe that there are more important things than the tabulator size, I doubt that I ever change to another IDE than Visual Studio, so whatever you decide to use in the community branch,... in the official SVN we either will change all tabs to spaces or leave it like it is (although writing an addin to run AStyle or another code style tool would be not to much effort and I really think about it).
Why not concentrate on features, bug fixes and the improvment of the code than on the discussion about whitespaces... BTW, we could also change the coding language from C++ to
whitespaces Sorry, just my two cents.