I tried to install 13.04 32bit on an Acer Aspire One 756, using an external USB DVD drive. My problem is that I get only a black screen with blinking text-cursor. No message occurs and holding the shift key down does not make any difference. I assume that the boot loader of the DVD fails.

The same DVD boots fine on another computer. The older version 12.04 works fine on my Acer notebook. Unformtunately the computer cannot boot from USB sticks, so I cannot try that as an alternative.

I like to report this as a bug, but I did not find out how to report bugs without using the ubuntu-bugs program.