Consequences of upgrading distribution?
There's a proprietary application that I need that is packaged within a Ubuntu 9.04 live ISO, so I'd like to upgrade the whole thing, including the kernel + libraries to benefit from its extra hardware support, add some missing applications and device drivers, and generate a new ISO ready to be burned on a USB/CD.
What issues should I expect? Are Linux applications/libraries downward-compatible, so that the proprietary application is likely to still work, even though I upgraded the kernel and libraries?
Thank you for any feedback.