9.10 + 0.94 = ……
Sorry for the Mathematical title
As you've undoubtedly guessed - I've upgraded to Lucid, a.k.a 10.04!! So far, from what little time I've been able to use it, I'm really liking what I see (I've installed the 64 bit version, for those curious). Naturally there are some bugs, but I'm reporting these using the built in tool if/when they occur.
One thing that did frustrate me (immensely), while trying to install Lucid, was the partitioning situation. I wiped my Ubuntu partition(s) completely, including my /home and everything. I decided before installing that I'd make backups of the important stuff, and go from there. Somewhat frustratingly, the partition manager mid-way through ubiquity decided to give up the ghost and die. Not a problem, I thought, as I downloaded the daily live CD, I'll just install from here....no go - the daily live CD was showing exactly the same issues as the Alpha 2 disc.
Before I ditched my attempts to install Lucid and drop back down to Karmic (9.10), I figured I'd try running GParted, and create the partitions before running ubiquity. Good job I did! This worked fine, without any hitches. Naturally I think I should've been able to specify my partitions as part of the ubiquity installer, but at least it's installed now! More on my Lucid thoughts as I get any experiences to share with it.

February 25th, 2010 - 02:05
resisting…temptation…lucid…must…wait…until…april…
February 25th, 2010 - 08:49
Frankly, I’ve always used GParted before I install simply because the Ubiquity partitioner died on me once and took my partition table with it. Some work with testdisk brought it back.
Also, the installer’s partition manager shows nothing about extended partitions or primary partitions and that’s kind of odd.
March 1st, 2010 - 16:56
Just upgraded one box to Lucid at the weekend there and hit the exact same problem. Ubiquity unexpectedly closed after setting up the partitions for root, home and swap. Nothing complex.
Also had to run gparted on the live disk first, then simply allocate the partitions mount points in Ubiquity.
If you log a bug, I’ll me-too it. I haven’t done one yet.