On my test system, I had a 10.04 64 Bit system installed and i had the same problem.
So it seems, that this is not a 32 Bit problem.
I tried, to upgrade my test system to Ubuntu 10.10, but after upgrade a had no GUI any more.
Next I tried to install Ubuntu 10.10 32 Bit from CD, but the installation process let me not partition the Disk.
I will next try to install Ubuntu 11.04 Alpha2 32 Bit.
I will report my experiences here.
So it seems, that this is not a 32 Bit problem.
I tried, to upgrade my test system to Ubuntu 10.10, but after upgrade a had no GUI any more.
Next I tried to install Ubuntu 10.10 32 Bit from CD, but the installation process let me not partition the Disk.
I will next try to install Ubuntu 11.04 Alpha2 32 Bit.
I will report my experiences here.