<(?Unable to render embedded object: File (?[pP][hH][pP])(?) not found..*>)

which finds unmatched < that are not part of an open PHP tag. There are about a dozen in the lang files, all of which are HTML tags in help files wrapped over two lines, except for string addrandom1 in quiz.php, which is no longer used anywhere.

admin.php string importlangreminder
editor.php string cutpastemozilla
enrol_authroize.php strings logindesc,

They should be replaced by $THEME->rarrow, after calling check_theme_arrows(). This is an accessibility thing.

The quiz string Move to >> is no longer used anywhere.

I have fixed the one genuine occurrence in quiz.php.

$a = new stdClass;
$a->catname = '<strong>' . $category->name . '</strong>';
$a->arrow = $THEME->rarrow;
echo get_string('addnewquestionsqbank','quiz', $a);

This seems to cause the following in function get_string(), breaking the UI:

Catchable fatal error: Object of class stdClass could not be converted to string in /home/olli/workspace/moodle2cvs/lib/moodlelib.php(5435) : eval()'d code on line 1

I am not familiar with this way of using get_string, so I don't know how to fix it.