WARNING: This image is OVERSIZED. This should never happen during milestone testing.
Proceed in your native language if you wish. Instructions will remain in English.
If all actions produce the expected results described, please submit a 'passed' result. If any action fails, or produces an unexpected result, please submit a 'failed' result and file a bug. Please be sure to include the bug number when you submit your result.
After first failed test, I had to remove completely all partition manually. I've launched a new installation, and the bug #1552413 stopped me again
#990744 seems to be an old bug. Apparently if I have already Xubuntu (or something else?) installed this bug prevents me to install Xubuntu.