[Anjuta-list] Anjuta-1.2.4a: adding include paths - what's wrong?

[Igor Gorbounov <igorbounov topazelectro ru>]

Hi, All!
I've added in a many-years-old gtkmm project a new include path 
(/usr/include/libglademm-2.4).
To do so I've used "Settings->Compiler and Linker Options->Include Paths".
After closing this dialog window I've answered "Yes" to complete 
rebuilding of the whole
project.
Nevertheless, when building (F11), I didn't see the new include path in
"g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/include/gtkmm-2.4 ..." line. 
And, of course,
there were complains about #include <libglademm/xml.h>.
Then I've tried combinations "build->autogenerate->build" and 
"build->configure->build"
without any success - the new include path missed everytime.
So only after editing by hand the src/Makefile the success was achieved.
What was I doing wrong?
   Igor Gorbounov