Distribution Wizard aborts prematurely

Installation from scratch on a clean Debian Squeeze instance.

The distribution wizard aborts before the full installation is finished. After the dialog that prompts you to log in with Admin/admin, the user gets stuck in an incompletely installed wiki with no way of finishing the setup. The recommended solution to re-run the distribution wizard (see http://www.xwiki.org/xwiki/bin/view/FAQ/Why+does+the+Distribution+Wizard+fail+to+appear+after+an+install) did NOT make the wizard reappear.

After logging in, I had to go back to the distribution wizard manually, like so:

• use the browser back /history button to navigate to the ../distribution/... link.
• click on "INSTALL" or "DETAILS". There will be an error message.
• Navigate back and forth until the "XWiki Enterprise - UI - Main wiki" extension is displayed as "installed" and the "CONTINUE" button is shown.

But even though this course of action results in a functioning wiki, there are obvious defects, such as missing translations. This can be fixed by uninstalling and re-installing extensions, but this also has side effects.