It seems that in SourceForge it is not possible to add a comment to a closed bug. Why?
Regarding the bug:
Ctrl and Alt Keys Not Working - ID: 3529628
In my case the option that was causing the problem with Ctrl key in Ubuntu 12.04 was Show position of pointer when the Control key is pressed. So I did not need to delete the whole /home/gotit/.config/dconf/user.
12.04 KeePass Ctrl and Alt Keys Not Recognized
Bug #9441 "the locate pointer option breaks other keybindings"
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