Thanks for your help. I think (and I am guessing here) that the problem occured when mounting /home to my 3rd (hda3) partition. This was the partition which I resised, while it was mounted.
Anyway, i redid the operation late last night, using ddrescue (a very nice package for data recovery) instead of dd. Then i booted of a cd, and did the partition resizing while the partitions were not mounted. Worked like a charm, I now have 10 times more free space on my /home partition, which is what I was after.
So, chalk this one up as solved!