1a3b838dff
The splash window was being hidden by default on OS X as soon as someone called Splash::pop_back_for(), because of window layering issues on OS X. But then the next call to ::message() would not return because a recursive event loop was started that waits for the expose event, which never comes. So, (a) show the window when ::message() is called AND (b) remove the recursive event loop because (b.1) we don't seem to need it (b.2) recursive event loops are generally evil.
Please see the Ardour web site at http://ardour.org/ for all documentation..
For information on building ardour:
http://ardour.org/development.html