Thanks for the suggestion. However I already tried that and it did not work. It still said the password was incorrect.
This is really incredibly weird since I have used that password before before I got the 'system error: database corrupt' notification on my old pc. It always worked perfectly and I always had the paper in front of me (with the password) when I typed it.
And now it does not work anymore...
OK try installing a fresh copy of bitcoin-qt.