Core

This is still an issue.
Interestingly it works correctly for (most?) other sections on that screen, but not for this one (although the sourcecode is basically the same...).

I just checked that: It works correctly for all(!) other sections. This is the only one with that problem.

The Problem is the String "USER_FUNCTION:typo3conf/pageUnavailableHandling.php:user_pageUnavailable->pageUnavailable" whoch could not be breaked by the browser.

So a simple space behind the "->" would fix that. A nobrainer in the end...

Or even better: Adding the CSS definition

word-wrap: break-word;

can fix that.

@christopher:
Is word-wrap really part of the css standard? AFAIK it's an IE invention and obviously does not work under Firefox...

Just tried adding "word-wrap: break-word; white-space: -moz-pre-wrap;" to the li-elements which worked fine.

Would it be appropriate to use such mozilla specific settings?!

word-wrap only is part of CSS3 I think. So, it is not yet a standard, but I read that it already should work in Firefox.
But the moz... property you propose is no standard either, is it? ;) Doesn't it work without that?

"word-wrap: break-word" seems not to word under FF 3.6.x.

OK.

Just take the solution you like best!
The same problem is there at 2 other places in the same file:
- The line displaying PATH_thisScript in Basic Configuration and
- The same line in the part "Clean up"
Would be great if you could fix that the same way then!

Added a patch to solve this issue:
- added new class t3-install-description to "All configuration page"
- formatted that class: word-wrap: break-word; width: 48em;

@christoph: word-wrap works in FF when the element has a defined width.

The same problem is there at 2 other places in the same file:
- The line displaying PATH_thisScript in Basic Configuration and

Works fine in TYPO3 4.4 / 4.5 under FF & IE8. Any info on which browsers have to be used to reproduce the problem?

- The same line in the part "Clean up"

Could not see where this problem arises.

- The line displaying PATH_thisScript in Basic Configuration

Indeed! I just saw the screenshot
http://bugs.typo3.org/file_download.php?file_id=11892&type=bug
which is attached to #22975.
I just noticed: For me a path, which would be too long, is broken at a "-" sign in the path. And paths without such a "-" are broken at the slash next to the border of the div box. Great!

- The same line in the part "Clean up"

Yes, sorry for the inconvenience. Seems like this line was removed since I last checked that.

This works even when there is no "-" in the path. In my installation the word "pageUnavailable" gets split up across lines.

Your patch works and solves the problem!

Send it to Core List!

Patch is submitted to core list, give it a +1 if you like the solution.

Committed to trunk rev. 9816.
Thanks for your contribution, Marc!