Acer 5051 AWXMi (Acer 5050 derivative) laptop. AMD Turion MK36 2GHz, 1GB RAM.
I did a frsh Ubuntu Gutsy install (previous Xubuntu Feisty) on this laptop, which worked.... almost flawlessly. LivecD worked just fine. "Guided" install using largest continuous free space, and I was installed about 20 minutes later. Rebooted after about a 5 minute delay after GRUB, but still loaded up OK.
A 2 second forum search found this solution, which is very elegant: http://ubuntuforums.org/showthread.php?t=581075
5 mintues later, Ubuntu Gutsy runs with flashy desktop effects with no problems, after a quick update and Synaptic installation of the ATI drivers: http://ubuntuforums.org/showthread.php?t=580748
Now, the benefits are very clear. More stable than Feisty, boot quicker, and my internal SD card reader works (although still doesn't recognise Memory Sticks). Wifi even works flawlessly without tweaks. Excellent.
I can't recommend Gutsy enough (from a fresh install).