soul package doesn't work with diacritical marks

[Marek Jancuska]

Commands from soul package don't work if their argument contains diacritical marks. For example, if a LaTeX file contains \st{č}, i get the following error message:

! Argument of \UTFviii@two@octets has an extra }.
<inserted text>
                \par
l.31 \st{č}

? R
OK, entering \nonstopmode...
! Missing \endcsname inserted.
<to be read again>
                   \par
l.31 \st{č}

The control sequence marked <to be read again> should
not appear between \csname and \endcsname.

! Package inputenc Error: Unicode char \u8:�\endcsname not set up for use with
LaTeX.

See the inputenc package documentation for explanation.
Type H <return> for immediate help.
 ...

l.31 \st{č}

Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.

! Package inputenc Error: Unicode char \u8:�\the not set up for use with LaTeX.

See the inputenc package documentation for explanation.
Type H <return> for immediate help.
 ...

l.31 \st{č}

Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.

! Missing { inserted.
<to be read again>
                   }
l.31 \st{č}

A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

! Package inputenc Error: Unicode char \u8:�\null not set up for use with LaTeX
.

See the inputenc package documentation for explanation.
Type H <return> for immediate help.
 ...

l.31 \st{č}

Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.

! Package soul Error: Reconstruction failed.

See the soul package documentation for explanation.
Type H <return> for immediate help.
 ...

l.31 \st{č}

I came across hyphenatable material enclosed in group braces,
which I can't handle. Either drop the braces or make the material
unbreakable using an \mbox (\hbox). Note that a space
also counts as possible hyphenation point. See page 4 of the manual.
I'm leaving a black square so that you can see where I am right now.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 8.10
Package: texlive-latex-extra 2007.dfsg.2-1ubuntu1
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/bash
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/username/bin:/home/username/programs/work-stealing/MPS/bin/Linux:/home/username/bin:/home/username/programs/work-stealing/MPS/bin/Linux
 LANG=en_US.UTF-8
 LANGUAGE=
SourcePackage: texlive-extra
Uname: Linux 2.6.27-11-generic i686

[Marek Jancuska (marek-jancuska)]

This bug makes "change tracking" feature of LyX unusable, because LyX uses \st{} to highlight deleted text.
A workaround is to add \def\st#1{#1} in the LaTeX preamble.

[Marek Jancuska (marek-jancuska)]

I found out that the problem is related to using utf8 encoding. When I use \usepackage[latin2]{inputenc}, everything goes ok. (so this is another workaround)