Hi! I just reproduced this issue. Steps : - wipe the disk ( size 160 GB ) - boot d-i pre-rc2 CD ( netinst.iso ) - create an ext3 partition for / fs, type "logical", size 16 G - create a swap partition , type "primary" , size 1 G Results : 16G logical partition inside a 16 G extended partition ( and of course the 1 G primary partition )