"Ubuntu - Linux for Human Beings!" (About Ubuntu) page contains encoding error

Per Ångström, thanks for your report. I am not able to reproduce this problem. Are you using a different locale, like UK English? If so, it is possible that translation missed a tag or something. If not, please try reinstalling ubuntu-docs to see if that fixes the problem:
   sudo apt-get clean
   sudo apt-get install --reinstall ubuntu-docs

Please let us know if that works or not. Thanks in advance.

LANG=en_US.utf8
LANGUAGE=en_US.utf8
LC_CTYPE=sv_SE.utf8
LC_NUMERIC=sv_SE.utf8
LC_TIME=sv_SE.utf8
LC_COLLATE=sv_SE.utf8
LC_MONETARY=sv_SE.utf8
LC_MESSAGES=en_US.utf8
LC_PAPER=sv_SE.utf8
LC_NAME=sv_SE.utf8
LC_ADDRESS=sv_SE.utf8
LC_TELEPHONE=sv_SE.utf8
LC_MEASUREMENT=sv_SE.utf8
LC_IDENTIFICATION=sv_SE.utf8
LC_ALL=

Reinstalling ubuntu-docs did not help.

I can reproduce the problem on my second machine, which is running a fully updated Lucid. My user on that machine has the same locale as above.

I switched to an all en_US.utf8 locale, and that didn't help. Then I switched back, and the error was gone! This was on my first machine. I will try the same thing on my other machine later.

Thanks for getting back to us. Based on your previous comment, I will close this bug report. Please re-open it by changing the status back to New if the problem re-appears on your other machine.

I'm unable to work around the issue on my second machine.

Has anybody tried to reproduce the issue using my locale settings?

Per, can you run this command please and post the ouput:

xmllint --noout --xinclude --noent --postvalid /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml

# xmllint --noout --xinclude --noent --postvalid /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml
warning: failed to load external entity "/usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml"

# ls -l /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml
lrwxrwxrwx 1 root root 63 2010-01-14 19:13 /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml -> /usr/share/gnome/help-langpack/about-ubuntu/sv/about-ubuntu.xml
# ls -lL /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml
ls: cannot access /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml: No such file or directory

I think we're looking for the wrong file. Remember that my language locale is en_US.

That's fine. Now try:

xmllint --noout --xinclude --noent --postvalid /usr/share/gnome/help/about-ubuntu/C/about-ubuntu.xml

No output. I think that means the document is well-formed.

Ok, I don't think there is a problem with ubuntu-docs here, could be a problem with yelp so I'll reassign the bug there.

The error appears on my Lucid system, AMD64 alternates between the below
two errors(in a pink box at top of page).

This page contains the following errors:
error on line 448 at column 737: AttValue: " or ' expected
Below is a rendering of the page up to the first error.

or

This page contains the following errors:
error on line 448 at column 725: Encoding error
Below is a rendering of the page up to the first error.

xmllint --noout --xinclude --noent --postvalid /usr/share/gnome/help/about-ubuntu/C/about-ubuntu.xml
no output

My locale is C, by the way, fully patched on Feb 1.
$ locale
LANG=C
LC_CTYPE="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=

This error also occurs on my lucid system - amd64

Error:
error on line 448 at column 737: AttValue: " or ' expected

xmllint --noout --xinclude --noent --postvalid /usr/share/gnome/help/about-ubuntu/C/about-ubuntu.xml

no output

$locale
LANG=en_IN.utf8
LANGUAGE=en_IN.utf8
LC_CTYPE="en_IN.utf8"
LC_NUMERIC="en_IN.utf8"
LC_TIME="en_IN.utf8"
LC_COLLATE="en_IN.utf8"
LC_MONETARY="en_IN.utf8"
LC_MESSAGES="en_IN.utf8"
LC_PAPER="en_IN.utf8"
LC_NAME="en_IN.utf8"
LC_ADDRESS="en_IN.utf8"
LC_TELEPHONE="en_IN.utf8"
LC_MEASUREMENT="en_IN.utf8"
LC_IDENTIFICATION="en_IN.utf8"
LC_ALL=

Navigation box appears to have a sporadic problem.
There is another page with this problem which causes a pink error box at the top of the page:
How Can I Upgrade to the latest version of Ubuntu?
The error is not consistent -- it's either:
 1)Not present (rare).
 2)line 467 col 46 Encoding error
 2)line 46 col 62 invalid character
 4)line 46 col 63 invalid character

The page appears to be complete, but the navigation box at the bottom (previous..., next...) is missing.

There is no nav box on the first page either, Ubuntu -- Linux for Human Beings either.

on my fully updated lucid I found:

ls -l /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml
lrwxrwxrwx 1 root root 63 2010-01-14 17:33 /usr/share/gnome/help/about-ubuntu/sv/about-ubuntu.xml -> /usr/share/gnome/help-langpack/about-ubuntu/sv/about-ubuntu.xml

but the linked doc and dir don't exist

and

ls /usr/share/gnome/help-langpack/about-ubuntu/
en_AU en_CA en_GB

shouldn't there be an en_US locale directory?

I'm no longer seeing this on either of my test machines.

Can this bug be closed?

Thank you for reporting this bug.

As per your comments this issue is fixed. Marking as such.