We will unfortunately have a version 1.4.1 of BlueGriffon before 1.5... Let me explain you why: below are screenshots of the very same modal window opened by nsIWindowWatcher.openWindow() on Windows XP, Windows 8, OS X, Ubuntu 10.10, and finally Fedora 16...

Windows XP Windows 8 OS X Ubuntu 10.10 Fedora 16

I guess you can immediately see the difference: no close button on Fedora if the window features don't include "dialog=no" :-( That drastically impacts (in some add-ons, the table properties, the spellchecker, SVG Edit) some Linux users of BlueGriffon who have usually no idea how to tweak their Gnome settings to fix the issue. Hence the need for a 1.4.1...