[kubuntu] Two home folders, system screwed, please help!!

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http://ubuntuforums.org – Kubuntu 12.10, KDE 4.95 I'm not sure what has happened, but somehow i have developed a problem in accessing the /home folder that has screwed my whole system... i seem to have two /home folders in the 'places' section of Dolphin: one directs to /home/username the other to /root/ Since the early hours of this morning some programs that depend on config files in home/username are either not working or have default configuration . other, however, (like firefox) seem unaffected....? what can have caused this? how can is solve this? Help gratefully received!! (Hardware)