Composing a ć in GTK applications results in a ç with the default input method

[Julius Schwartzenberg]

When I use a GTK applcation such as Chromium or Firefox and I type the following keys:
compose ' c

A ç character is printed.

When I change the input method to X Input method or use a non-GTK application, I get a proper ć.

The key sequence "compose , c" is already reserved for typing a ç, so a ç can always be typed. This problem makes it completely impossible to compose a ć in GTK applications however, without switching the input method manually every time.

It seems this is a bug in the default input method used for GTK applications. In for example Qt4 applications, everything works correctly.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ibus 1.4.1-3ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Mon Jun 25 13:43:33 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120204)
ProcEnviron:
 LANGUAGE=nl_NL
 TERM=xterm
 PATH=(custom, user)
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
SourcePackage: ibus
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[gg (gg3)]

For Ubuntu 12.04 x86_64, the following worked:
1. Check en_US.UTF-8/Compose
2. Add export GTK_IM_MODULE="xim" to /etc/environment for a global change or create a ~/.gnomerc with that line for a single user's change
3. restart X
Solution found in http://wiki.ubuntuusers.de/Sonderzeichen