The "short answer" does not display correctly in Item analysis report. The answers wich are verified with wilcard appears as false as you can see on En-2008-06-19_090348.png screenshot.
On the other hand, it works for user reports on the Overview.

It doesn't compare correctly strings with wildcards as we can see on the second screenshot (exemple.png) :
- For the answer "celine" it's correct. 1 user as answer "celine".
- But for the answer "c*line", the user who has answered "caline" must be count or it appears as false. (same problem for the answer "*line" for "aline")
 
The problem still in Moodle 1.9.1 on windows/Mysql

I've fix the problem : /var/www/moodle184test/question/type/shortanswer/questiontype.php.
I've replace the compare_responses function by :
function compare_responses($question, $state, $teststate) {
if (isset($state->responses['']) && isset($teststate->responses[''])) {
return $this->compare_string_with_wildcard(stripslashes_safe($state->responses['']),
$teststate->responses[''], !$question->options->usecase);
}
return false;
}