fdisk limited?

Hi,

I would like to know if there are limitations to fdisk (tested with 
tomsrtbt1.7.361 (fdisk v2.8) and tomsrtbt2.0.103 (fdisj v2.11qto)):

It tells me that I can't create another partition:
No free sectors available

But there are 9Go left at the end of the disk (and from mdk9.1 with diskdrake 
I can create new partitions).

The situation is (a 60Go disk: /dev/hda) with mdk9.1 and w95:
Sectors:
1-255		/dev/hda1	win_c
256-6107		/dev/hda2	extended fat32 partition

256-510		/dev/hda5	win_d
511-512		/dev/hda3	/boot
513-523		/dev/hda6
524-573		/dev/hda4	SWAP
574-1196		/dev/hda9	/
1197-1812	/dev/hda10	/var
1813-2484	/dev/hda11	/usr
2485-3071	/dev/hda7	win_e
3072-3719	/dev/hda12	/home
3720-4205	/dev/hda8
4206-4571	/dev/hda13
4572-6107	/dev/hda14	/home/reserve

Partitions not commented contain knoppix installation.

I did many tests with this disk.
It explains why partitions are the way they are.

What could explain the message I get?

Thank you for your explainations...
-- 
Stephane Boireau
Personne ressource TICE du collège Le Hameau à Bernay (27)