Resize doesn't work

I've confirmed that this occurs to me as well on a laptop with the primary partition being NTFS.

I seem to be having this problem as well, it just hangs and does nothing. I let it sit for about and hour without any kind of indication it was doing anything :(

HP Pavilion ze2000 with 60GB HD and 1.5GB RAM trying to allocate 10GB to Ubuntu (stupid messy windows side)... everything is OEM.

I have similar problems, I couldn't resize the mostly empty defragmented win partition nor other ext3 partition on another computer. I don't understand because both things I have already done using gparted in previous distributions!!!

In regards to the OP, I'm no expert, but the EXT file systems scatter the locations of files randomly over the partition. This has the benefits of greatly reducing fragmentation required, but I would assume this makes it near impossible to reduce the size of one of these partitions without formatting.
That said, gparted could give some useful feedback.

You need to provide more information:
1) output of command: apt-cache policy gparted
2) output of command: ls -l /dev/disk/by-id/
3) output of command: sudo fdisk -l
4) output of command: mount

I'd suggest to try and resize your hard drive when you're within a live cd environment, see if you have the same problems.
Another thing I would suggest is to check your hard drive partitions manually even before resizing. (In gnome partition editor, right-click on partition and select "Check").
A third suggestion would be to actually do the same checking on your own:
sudo e2fck /dev/sda1
(where /dev/sda1 should be replaced with the partition in question)

setting as incomplete, until someone provides more information

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!