The US International keyboard layout has 5 dead keys (see http://en.wikipedia.org/wiki/Keyboard_layout#US-International):  `, ~, ^, ', "

These all work beautifully in conjunction with other keys, so `+e results in è, ~+n results in ñ, and so on.

In order to get one of the dead keys themselves, one needs to press <dead key> followed by <space>. This too works for `, ~ and ^.

However, the combinations ' + <space> and " + <space> seem to be broken, as they result in ´ and ¨, which should only appear after pressing <AltGr> + ' and <AltGr> + <Shift> + ', respectively.

So far, I've tested two Gtk+ applications which exhibit this behavior on Windows XP and Windows 7 (probably all Windows versions):

* gedit 2.30.1 (seems to rely on Gtk+ 2.16.6)
* Leksah (seems to rely on Gtk+ 2.18.7)

The native version seems to be fine - on my Ubuntu box everything works as expected.

There are already two similar bug reports, namely:
* ID 617583
* ID 613148

However, those address a different issue, as dead key combinations work just fine with the Win32 port.