Doxygen fails with error

   Error opening map file xxx for inclusion in the docs!

if @dot is used inside a group.

Note: 
  - This appears to be different from Bug 525273
  - This is new in doxygen 1.6.2, it does not appear in doxygen 1.6.1


Example:

1. Create a file test.h with this contents:

        /** \defgroup test Test
         **
        \dot
           digraph example {
                // nodes
                A
                B

                // edges
                A -> B
           }
        \enddot
         **/

2. Create an default configuration file using:

      doxygen -g

3.  In Doxfile, change the following settings:

     INPUT                  = test.h
     HAVE_DOT               = YES

4. Run doxygen:

     doxygen

If test.h is located in D:/x23 you will get the following error message
(note the incorrect path D:/x23/html/D:/x23/html):

Error opening map file D:/x23/html/D:/x23/html/inline_dotgraph_1.dot.map for   inclusion in the docs!
If you installed Graphviz/dot after a previous failing run,
try deleting the output directory and rerun doxygen.