I have had a following error with GTK+ 2.20.1 and GtkExtra 2.1.2:
gtkitementry.c:134: error: static declaration of 'gtk_entry_reset_im_context' follows non-static declaration
/usr/include/gtk-2.0/gtk/gtkentry.h:311: note: previous declaration of 'gtk_entry_reset_im_context' was here
Sorry, GTK+ has version 2.21.5.
Hi Yuri
Try the development version (gtkextra-3) from CVS.
A lot of bugs have been fixed, also this one.