I'm experiencing this problem in Kubuntu 14.04 too. I'm using Ibus-anthy and Spanish, German, English, and Japanese languages in my system. My default language is Spanish and everything is up-to-date.
When I write on GTK programs like Firefox, Thunderbird or Libreoffice everything is fine. However if I do alt+tab, I lose the ability to write the Spanish accents. For some reason, this is persistent in Libreoffice and Thunderbird but not in Firefox. Any QT program doesn't experience this fortunately.
A workaround I found was to disable ibus and begin a new Libreoffice instance for example. By doing this, if I switch alt+tab everything seems cool.
I'm experiencing this problem in Kubuntu 14.04 too. I'm using Ibus-anthy and Spanish, German, English, and Japanese languages in my system. My default language is Spanish and everything is up-to-date.
When I write on GTK programs like Firefox, Thunderbird or Libreoffice everything is fine. However if I do alt+tab, I lose the ability to write the Spanish accents. For some reason, this is persistent in Libreoffice and Thunderbird but not in Firefox. Any QT program doesn't experience this fortunately.
A workaround I found was to disable ibus and begin a new Libreoffice instance for example. By doing this, if I switch alt+tab everything seems cool.