Another bug I found in 7.7 cvs, I think.
The latest change (1.6) changes push_text() to ref_push_string(_STR()).
Unfortunately, those were in a %{ %} block, which gets passed untranslated I believe. So, _STR() didn't get translated to the correct code, and GTK2.setup_gtk() returns with an undefined symbol: _STR.
It should either get changed back to push_text(), or maybe to something else.