I recently successfully installed Ubuntu Hoary preview on one laptop, without any difficulty. I just attempted to install it on another laptop, using the same CD, and at about 70% through installing the base system, after displaying a message that it is updating available packages, I receive the following error message:

No installable kernel was found in the defined APT sources.
The current default kernel package is 'kernel-image.'
You may try to continue though this rather strange error is probably fatal.

As predicted, I am unable to continue with the installation. It successfully configured my network card, so it's not an issue of accessing the internet. Any idea what the heck is going on? The laptop is a Dell Inspiron 5000e, with superior specs to the laptop I successfully installed it on. Thanks.

I should mention that my Dell has trouble otherwise reading the CD. Before I got the error message regarding the kernel, I sometimes received messages at a couple different points that it couldn't read the cd or there was none installed. I simply restarted, but when these issues didn't arise, I was confronted with the kernel issue (3 times now). But my Dell has never had trouble reading any other CDs, and as I mentioned none of this happened when I installed on the other laptop. Very odd indeed.

ok - after giving up last night, it worked today the first time I tried. I don't know if it finally worked because I disconnected my peripherals or not. I still have no idea why it would have so much trouble with the CD. Thanks for taking the time to review this.