@ Evan Dandrea, I just tried two more installs , using ubiquity version 2.3.13, details below: I began with another entire disc install, beginning with only one drive installed: ubuntu@ubuntu:~$ sudo parted /dev/sda print Model: ATA WDC WD800JB-00JJ (scsi) Disk /dev/sda: 80.0GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 25.4GB 25.4GB primary ext4 boot 2 25.4GB 80.0GB 54.7GB extended 6 25.4GB 50.1GB 24.7GB logical ext4 8 50.1GB 73.5GB 23.4GB logical ext4 9 73.5GB 74.6GB 1061MB logical linux-swap(v1) 7 74.6GB 76.7GB 2142MB logical linux-swap(v1) 5 76.7GB 80.0GB 3305MB logical linux-swap(v1) After choosing the "Erase and use entire disc" option I'm taken to a screen that shows "Allocate drive space" and I see the graphic "Ubuntu /dev/sda (ext4) 0.0B" with the two options "Use entire partition" or "Split largest partition". Since I'd already selected the "entire disc" option why is it even asking me those two questions? Which partition? I've already chosen to "Erase and use entire disc" so why ask if I want to split a partition? Also the "use the advanced partitioning tool" option was NOT available! I clicked on neither one of those options. I just clicked on "Install now". It did install properly (I rebooted to be sure): lance@lance-desktop:~$ sudo parted /dev/sda print Model: ATA WDC WD800JB-00JJ (scsi) Disk /dev/sda: 80.0GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 76.7GB 76.7GB primary ext4 boot 2 76.7GB 80.0GB 3305MB extended 5 76.7GB 80.0GB 3305MB logical linux-swap(v1) But I can easily see how this would be very confusing, Next I went for a "side by side" install on that same drive. I made no changes to the partitions before beginning. After clicking on "Install side by side choosing between...." I go to a screen that this time shows the partitions properly. It showed 37.8GB and 38GB, and it showed one smaller partition hidden (obviously SWAP) along with the option to use the advanced partitioning tool. And the "slider" works to change partition size. But it also shows the options to "Use entire partition" or "Use entire disc". Need I explain the potential confusion surrounding that? Which partition are they referring to? Which disc? Remember that Windows users are used to thinking "A", "C", "D", etc. Many don't know the difference between a disc and a partition because Windows keeps us "dumbed down" :^) However I simply bypassed those options again, clicked on "Install now", and the install was successful: ubuntu@ubuntu:~$ sudo parted /dev/sda print Model: ATA WDC WD800JB-00JJ (scsi) Disk /dev/sda: 80.0GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 38.7GB 38.7GB primary ext4 boot 2 38.7GB 80.0GB 41.3GB extended 6 38.7GB 75.1GB 36.4GB logical ext4 7 75.1GB 76.7GB 1605MB logical linux-swap(v1) 5 76.7GB 80.0GB 3305MB logical linux-swap(v1) I wish I could come up with some consistent pattern here but I've been testing with both 2.3.12 and 2.3.13 the past two days and I can not find a consistent behavior :^( I'd first thought it had to do with the number of partitions but I've now tried it enough to know that's not the case. The problem is also not just limited to this "misreading" of drive/partition size. Improper (or poorly described) options are offered after making an initial selection. So, I'm thinking this at least needs a mention in the release notes but the behavior is so inconsistent I have no idea what a person could say. I very much fear what will happen with Win 7 users because many OEM installs have 3 existing partitions (one tiny one with part of the boot files, another with sys utility, and the big one with the actual OS). This scares me big time. Even for a Beta! I'm quite tired so if this makes very little sense please accept my apologies in advance, and hang in there ;^) I certainly don't envy the situation this change puts you in.