Howdy,
I just now solved this issue on my system running SL & Ubuntu Netbook Remix 9.10. Same symptoms you guys had. I downloaded the Ubuntu Alternate Install CD from
Ubuntu 9.10 (Karmic Koala) then burned the ISO to a CD.
Once I had the CD, I was able to boot from it. Once you get to the menu with the option 'Rescue a broken system', I selected that. It will ask you about your language, your keyboard, etc. Once it's done detecting and loading, you get to an 'Enter Rescue Mode' screen that asks you which device to use as your root file system. In my case, I've got SL installed on /dev/sda2 and Ubuntu on /dev/sda3 with swap at /dev/sda4. So I selected /dev/sda3 (my Ubuntu root). Next it comes to a menu where you have the opportunity to drop into a shell on the root you just selected, but if you already know where your system is installed, you can select 'ReInstall GRUB boot loader'. Enter the device name (again, in my case it was /dev/sda3) and click continue.
After everything is done, I rebooted without the disc. Chameleon came up just fine with 'Linux' as the second selection, and when I enter that it now immediately brings me to the GRUB menu.
Hope this helps!
m1sandman
Dell Mini 10v Dual-boot OSX 10.6.2/Ubuntu Netbook Remix
Dell Latitude D620 'Macitude' Dual-boot OSX 10.6.2/XP SP3
'HackPro' LifeHacker's Quad-Core Hackintosh build OSX 10.6.2
eeeMac Asus eeeBox B202 OSX 10.6.2 the Rivet Media Server