Wrong package description - "Cannot be installed on your computer type" when internet connection not available

Steps to reproduce:

1. Installed Ubuntu Feisty Beta from LiveCD on a PC without an internet connection
2. Started PC with Feisty installed, again, with no internet connection enabled.
3. Started Add/Remove Applications tool ( Application -> Add/Remove... )
4. Many/most packages, when selected, show the following description in the package information area:

"<ProgramName> cannot be installed on your computer type (i386). Either the application requires special hardware features or the vendor decided to not support your computer type."

Examples include:

AbiWord
Adept
Amarok
Akregator
Digikam
Epiphany

When clicking on the checkbox next to the application in order to install it, a message box appears informing the user that an internet connection is required to continue installation.

My guess is that Add/Remove Applications is not able to find a source for the package and so assumes that one is not available for this architecture.

The preferred result would be to see a package description and a note underneath that an internet connection is required for installation. Failing that, a more appropriate message should be shown explaining that the package description is not available until the package list has been updated.