Anton Karl Ingason

To fix the accent problem with TexMaker in Ubuntu where the accents stop going over the character but are instead written before them, so you get 'a instead of á (Icelandic, Spanish etc.), install the ibus-qt4 package:

sudo apt-get install ibus-qt4

Fedora equivalent:

yum install ibus-qt

(Source thread)

Easy fix for a very annoying and unpredictable problem. I have no idea why this happens occasionally without that package but according to online sources the bug affects some more Linux distributions even in the latest version of TexMaker.