Please describe the problem:
Doxygen produces wrong output if there is a namespace of name 'internal'.

Steps to reproduce:
/// \file

/// internal namespace
namespace internal {

/// struct Foo
struct Foo {};

} // namespace internal

/// typedef Bar
typedef internal::Foo Bar;

Doxyfile: default of 1.5.9


Actual results:
Bar is listed as variable(!) without type and name "__pad0__".

Expected results:
That Bar gets documented as typedef to internal::Foo.

Does this happen every time?
Yes.

Other information:
The problem disappears if the namespace is renamed or "typedef internal" is replaced by "typedef ::internal". Similar if there is an outer namespace and "typedef internal" is replaced by "typedef outer::internal". The problem with the second workaround is that there is no warning/error and one has to search the documentation to detect these problems.