Comment 11 for bug 961741

I tested again and
1. Unity: still has the problem and cannot type dead keys in Dash/HUD input box
2. Unity 2D: is OK.

Therefore, if it works for you, specify whether it's Unity or Unity 2D.

@Pander: Indeed GNOME (gtk+-based apps) use by default a slightly different set of dead keys from the dead keys you get from the X.Org dead keys. I was involved in this as a developer, and it's due to some legacy compose sequences that gtk+ used to have, and are still kept. However, the vast majority of compose sequences are the same.
If you test with acute + a = á, it's valid in both gtk+ and X.Org, therefore it can be used for general testing.

@ykanello: As long as the encoding is *.UTF-8, then it should be fine.
If you get the 'C' encoding, or some 8-bit encoding (iso-8859-1), then it's a problem. And you should write the steps to reproduce so that we can try them as well.